diff --git a/app/Livewire/Admin/MailPreview.php b/app/Livewire/Admin/MailPreview.php
new file mode 100644
index 0000000..2d42188
--- /dev/null
+++ b/app/Livewire/Admin/MailPreview.php
@@ -0,0 +1,82 @@
+<?php
+
+namespace App\Livewire\Admin;
+
+use App\Services\Mail\MailPreviews;
+use Illuminate\Support\Facades\Auth;
+use Illuminate\Support\Facades\Mail;
+use Livewire\Attributes\Layout;
+use Livewire\Component;
+use Throwable;
+
+/**
+ * Look at a mail before a customer does.
+ *
+ * There was no way to. An invoice mail needs an invoice, a maintenance
+ * announcement needs a window, and "register an account to see whether the
+ * confirmation reads well on a phone" is not a workflow — which is how every
+ * mail went out with a hard 600px table until somebody opened one on a
+ * telephone and had to scroll sideways to read a sentence.
+ *
+ * Two ways to look: in the browser, which answers the desktop question at once,
+ * and as a real mail to the operator's OWN address, which is the only way to
+ * answer the phone question. Never to a customer: a preview is for us.
+ */
+#[Layout('layouts.admin')]
+class MailPreview extends Component
+{
+    public function mount(): void
+    {
+        $this->authorize('mail.manage');
+    }
+
+    /**
+     * Send one to the signed-in operator.
+     *
+     * To themselves and nobody else — no address field. A preview that can be
+     * addressed is a form for sending mail to strangers from inside the console,
+     * which is not what this is for and not something to leave lying about.
+     */
+    public function sendToMe(string $key): void
+    {
+        $this->authorize('mail.manage');
+
+        $operator = Auth::guard('operator')->user();
+        $mailable = app(MailPreviews::class)->make($key);
+
+        if ($operator === null || $mailable === null) {
+            return;
+        }
+
+        try {
+            // sendNow(), not send(): every mailable here implements ShouldQueue,
+            // and send() silently defers to queue() for those — which would put
+            // a failure in a worker's log while the button reported success. The
+            // person pressing it is waiting for the mail, so the send happens in
+            // their request and its failure reaches them.
+            Mail::to($operator->email)->sendNow($mailable);
+        } catch (Throwable $e) {
+            $this->dispatch('notify', message: __('mail_preview.failed', [
+                'reason' => mb_substr($e->getMessage(), 0, 160),
+            ]));
+
+            return;
+        }
+
+        $this->dispatch('notify', message: __('mail_preview.sent', ['email' => $operator->email]));
+    }
+
+    public function render()
+    {
+        $this->authorize('mail.manage');
+
+        return view('livewire.admin.mail-preview', [
+            'previews' => app(MailPreviews::class)->all(),
+            'me' => Auth::guard('operator')->user()?->email ?? '',
+            // A preview that goes nowhere is worse than none: with a
+            // non-delivering mailer the browser view still works and the send
+            // silently writes to a file.
+            'delivers' => ! in_array(config('mail.default'), ['log', 'array', null], true),
+        ]);
+    }
+}
diff --git a/app/Livewire/Order.php b/app/Livewire/Order.php
index d8f309d..7f038ac 100644
--- a/app/Livewire/Order.php
+++ b/app/Livewire/Order.php
@@ -34,7 +34,12 @@ use Throwable;
  * purchase becomes real on the webhook, which is the only place allowed to
  * believe a payment happened.
  */
-#[Layout('layouts.portal')]
+// layouts.portal is the bare shell the SIGN-IN pages use: no navigation, no
+// page padding. This page is reached signed in and behind `verified`, so it
+// belongs in the app shell like every other portal page — Dashboard and Billing
+// were already there. In the wrong one it rendered flush against the top and
+// bottom of the window with no way back to anything.
+#[Layout('layouts.portal-app')]
 class Order extends Component
 {
     public function render()
diff --git a/app/Services/Mail/MailPreviews.php b/app/Services/Mail/MailPreviews.php
new file mode 100644
index 0000000..32b420d
--- /dev/null
+++ b/app/Services/Mail/MailPreviews.php
@@ -0,0 +1,205 @@
+<?php
+
+namespace App\Services\Mail;
+
+use App\Mail\InvoiceMail;
+use App\Mail\MaintenanceAnnouncementMail;
+use App\Mail\MaintenanceCancelledMail;
+use App\Mail\NewDeviceSignInMail;
+use App\Mail\OperatorMessageMail;
+use App\Mail\OrderConfirmationMail;
+use App\Mail\ResetPasswordMail;
+use App\Mail\VerifyEmailMail;
+use App\Models\Customer;
+use App\Models\Invoice;
+use App\Models\MaintenanceWindow;
+use App\Models\Order;
+use App\Models\User;
+use App\Models\UserDevice;
+use Illuminate\Mail\Mailable;
+use Illuminate\Support\Carbon;
+
+/**
+ * Every mail this application sends, built from sample data so it can be looked
+ * at without waiting for the event that would send it.
+ *
+ * There is no other way to see most of these. An invoice mail needs an invoice, a
+ * maintenance announcement needs a window, and "register an account to check
+ * whether the confirmation reads well on a phone" is not a workflow — which is
+ * how a mail with a hard 600px table went out for months before anybody opened
+ * one on a telephone.
+ *
+ * ## Nothing is written
+ *
+ * Every record here is built with `make()`, never `create()`: a preview must not
+ * leave an invoice, an order or a maintenance window behind in the database. The
+ * models exist for the length of one render.
+ *
+ * The one exception is by omission: where a real record already exists, it is
+ * NOT used. Rendering somebody's actual invoice to check a layout puts their
+ * figures in an operator's inbox for no reason.
+ */
+class MailPreviews
+{
+    /**
+     * The list, in the order somebody would read them: sign-up, purchase,
+     * operation, money, security.
+     *
+     * @return array<string, string> key => label
+     */
+    public function all(): array
+    {
+        return [
+            'verify-email' => 'E-Mail bestätigen (Registrierung)',
+            'reset-password' => 'Passwort zurücksetzen',
+            'order-confirmation' => 'Bestellbestätigung',
+            'cloud-ready' => 'Cloud ist bereit (Zugangsdaten)',
+            'maintenance-announcement' => 'Wartungsfenster angekündigt',
+            'maintenance-cancelled' => 'Wartungsfenster abgesagt',
+            'invoice' => 'Rechnung',
+            'new-device' => 'Anmeldung von einem neuen Gerät',
+            'operator-message' => 'Nachricht aus der Konsole',
+        ];
+    }
+
+    public function has(string $key): bool
+    {
+        return array_key_exists($key, $this->all());
+    }
+
+    /**
+     * One mailable, filled with sample data.
+     *
+     * Returns null for a key nobody knows rather than throwing: this is reached
+     * from a URL, and a URL is a string somebody can retype.
+     */
+    public function make(string $key): ?Mailable
+    {
+        if (! $this->has($key)) {
+            return null;
+        }
+
+        $customer = $this->customer();
+        $user = $this->user();
+
+        return match ($key) {
+            'verify-email' => new VerifyEmailMail($user),
+            'reset-password' => new ResetPasswordMail($user, 'https://example.test/reset/beispiel-token', 60),
+            'order-confirmation' => new OrderConfirmationMail($this->order($customer), $customer->name),
+            'cloud-ready' => $this->cloudReady($customer),
+            'maintenance-announcement' => new MaintenanceAnnouncementMail($this->window(), $customer),
+            'maintenance-cancelled' => new MaintenanceCancelledMail($this->window(), $customer),
+            'invoice' => new InvoiceMail($this->invoice($customer), $customer->name),
+            'new-device' => new NewDeviceSignInMail($customer->name, $this->device($user), 'web'),
+            'operator-message' => new OperatorMessageMail(
+                $customer,
+                'Zur Datenübernahme',
+                "Guten Tag Bea Berger,\n\nich habe mir Ihre Ausgangslage angesehen. Die Übernahme ist möglich.\n\nMit freundlichen Grüßen\nCluPilot",
+            ),
+            default => null,
+        };
+    }
+
+    // ---- The sample records. make(), never create(). ----
+
+    private function customer(): Customer
+    {
+        return Customer::make([
+            'name' => 'Beispiel GmbH',
+            'contact_name' => 'Bea Berger',
+            'email' => 'bea@beispiel.test',
+            'locale' => 'de',
+        ]);
+    }
+
+    private function user(): User
+    {
+        // The verification mail signs its URL from the model key, so the sample
+        // needs one — 0 is enough for a link nobody is meant to follow.
+        return User::make(['name' => 'Bea Berger', 'email' => 'bea@beispiel.test'])
+            ->forceFill(['id' => 0, 'email_verified_at' => null]);
+    }
+
+    private function order(Customer $customer): Order
+    {
+        return Order::make([
+            'plan' => 'start',
+            'amount_cents' => 4900,
+            'currency' => 'EUR',
+            'datacenter' => 'fsn',
+            'status' => 'paid',
+        ])->forceFill(['id' => 0, 'created_at' => Carbon::now()]);
+    }
+
+    private function invoice(Customer $customer): Invoice
+    {
+        // The document renders from its own snapshot, so a preview only needs a
+        // convincing snapshot — not a series, not a number drawn from one.
+        return Invoice::make([
+            'number' => 'RE-2026-0042',
+            'issued_on' => Carbon::now()->toDateString(),
+            'due_on' => Carbon::now()->addDays(14)->toDateString(),
+            'net_cents' => 4900,
+            'tax_cents' => 980,
+            'gross_cents' => 5880,
+            'currency' => 'EUR',
+            'snapshot' => ['meta' => ['number' => 'RE-2026-0042']],
+        ])->forceFill(['id' => 0, 'uuid' => '00000000-0000-0000-0000-000000000000']);
+    }
+
+    private function window(): MaintenanceWindow
+    {
+        return MaintenanceWindow::make([
+            'title' => 'Sicherheitsupdates Nextcloud',
+            'starts_at' => Carbon::now()->addDays(3)->setTime(2, 0),
+            'ends_at' => Carbon::now()->addDays(3)->setTime(4, 0),
+            'state' => 'scheduled',
+        ])->forceFill(['id' => 0]);
+    }
+
+    private function device(User $user): UserDevice
+    {
+        return UserDevice::make([
+            'guard' => 'web',
+            'name' => 'Firefox auf Linux',
+            'last_ip' => '203.0.113.42',
+            'last_seen_at' => Carbon::now(),
+        ])->forceFill(['id' => 0]);
+    }
+
+    /**
+     * The credentials mail is a notification rather than a Mailable.
+     *
+     * Built through its own toMail() so the preview shows the real thing, not a
+     * second copy of the wording that would then drift.
+     */
+    private function cloudReady(Customer $customer): Mailable
+    {
+        $mail = new class($customer) extends Mailable
+        {
+            public function __construct(public Customer $customer) {}
+
+            public function envelope(): \Illuminate\Mail\Mailables\Envelope
+            {
+                return new \Illuminate\Mail\Mailables\Envelope(subject: __('provisioning.mail.ready_subject'));
+            }
+
+            public function content(): \Illuminate\Mail\Mailables\Content
+            {
+                // The same keys App\Notifications\CloudReady hands the view. A
+                // preview that invented its own would render a mail nobody ever
+                // receives, and drift from the real one without saying so.
+                return new \Illuminate\Mail\Mailables\Content(view: 'mail.cloud-ready', with: [
+                    'name' => $this->customer->name,
+                    'url' => 'https://beispiel.clupilot.cloud',
+                    'plan' => 'start',
+                    'storage' => __('provisioning.mail.value_storage', ['gb' => 100]),
+                    'location' => 'Falkenstein, Deutschland',
+                    'dashboardUrl' => route('dashboard'),
+                ]);
+            }
+        };
+
+        return $mail;
+    }
+}
diff --git a/app/Support/Navigation.php b/app/Support/Navigation.php
index 491cfdf..d77f9b2 100644
--- a/app/Support/Navigation.php
+++ b/app/Support/Navigation.php
@@ -72,6 +72,10 @@ final class Navigation
             ]],
             ['label' => __('admin.nav_group.system'), 'items' => [
                 ['admin.mail', 'mail', 'mail', 'mail.manage'],
+                // Looking at a mail before a customer does. Beside the mailboxes
+                // it is sent from, not under Betrieb: both are about how mail
+                // leaves this installation.
+                ['admin.mail.preview', 'send', 'mail_preview', 'mail.manage'],
                 // System, not Betrieb: the tunnel is how the console reaches
                 // the estate at all. Nothing is provisioned, monitored or
                 // updated through anything else, so it belongs beside the other
diff --git a/lang/de/admin.php b/lang/de/admin.php
index 4fb00d9..e6fd38b 100644
--- a/lang/de/admin.php
+++ b/lang/de/admin.php
@@ -11,6 +11,7 @@ return [
     ],
 
     'nav' => [
+        'mail_preview' => 'E-Mail-Vorschau',
         'inbox' => 'Posteingang',
         'mail_log' => 'Postausgang',
         'templates' => 'E-Mail-Vorlagen',
diff --git a/lang/de/checkout.php b/lang/de/checkout.php
index d5306cf..663ced7 100644
--- a/lang/de/checkout.php
+++ b/lang/de/checkout.php
@@ -23,5 +23,10 @@ return [
     // Lasten ginge. Von der Zustimmung hängt jetzt nichts mehr ab; sie bleibt
     // als Beleg dafür, dass der Kunde den sofortigen Beginn verlangt hat.
     'immediate_start' => 'Ich verlange ausdrücklich, dass Sie mit der Leistung schon vor Ablauf der 14-tägigen Widerrufsfrist beginnen. Mein Widerrufsrecht bleibt davon unberührt: Bei einem Widerruf innerhalb der Frist erhalte ich den gesamten gezahlten Betrag zurück.',
-    'immediate_start_required' => 'Bitte bestätigen Sie, dass die Leistung sofort beginnen soll — sonst können wir Ihre Cloud erst nach Ablauf der Widerrufsfrist einrichten.',
+    // Sagt, was ohne die Bestätigung passiert: die Bestellung kommt nicht
+    // zustande. Der Satz stand einmal anders da („dann richten wir erst nach
+    // Ablauf der Frist ein") und versprach damit einen Weg, den es nicht gibt —
+    // eine Cloud wird nach der Zahlung eingerichtet und nicht vierzehn Tage
+    // später.
+    'immediate_start_required' => 'Ohne diese Bestätigung kommt die Bestellung nicht zustande — Ihre Cloud wird unmittelbar nach der Zahlung eingerichtet, einen Beginn erst nach vierzehn Tagen gibt es nicht. Ihr Widerrufsrecht bleibt davon unberührt: Bei einem Widerruf innerhalb der Frist erhalten Sie den gesamten Betrag zurück.',
 ];
diff --git a/lang/de/mail_preview.php b/lang/de/mail_preview.php
new file mode 100644
index 0000000..5a7633b
--- /dev/null
+++ b/lang/de/mail_preview.php
@@ -0,0 +1,12 @@
+<?php
+
+// Eine Mail ansehen, bevor ein Kunde sie sieht.
+return [
+    'title' => 'E-Mail-Vorschau',
+    'subtitle' => 'Jede Nachricht, die diese Installation verschickt, mit Beispieldaten gefüllt. Im Browser ansehen beantwortet die Frage am Rechner; als echte Mail an sich selbst schicken ist der einzige Weg, es am Telefon zu beurteilen.',
+    'open' => 'Im Browser',
+    'send' => 'An mich senden',
+    'sent' => 'Vorschau an :email geschickt.',
+    'failed' => 'Konnte nicht geschickt werden: :reason',
+    'note' => 'Gesendet wird immer an Ihre eigene Adresse (:email) — es gibt bewusst kein Empfängerfeld. Die Beispieldaten sind erfunden und werden nicht gespeichert.',
+];
diff --git a/lang/de/order.php b/lang/de/order.php
index 9b1650d..5a5572a 100644
--- a/lang/de/order.php
+++ b/lang/de/order.php
@@ -9,6 +9,7 @@ return [
 
     'recommended' => 'Empfohlen',
     'consent_title' => 'Sofortiger Beginn — bitte bestätigen',
+    'consent_why' => 'Ohne diese Bestätigung kommt die Bestellung nicht zustande. Es gibt keinen späteren Beginn: Ihre Cloud wird unmittelbar nach der Zahlung eingerichtet — und Ihr Widerrufsrecht behalten Sie vollständig.',
     'consent_first' => 'Bitte oben zuerst bestätigen.',
     'up_to' => 'bis :count',
     'per_month' => '/Monat',
diff --git a/lang/en/admin.php b/lang/en/admin.php
index b6fbe70..e008984 100644
--- a/lang/en/admin.php
+++ b/lang/en/admin.php
@@ -11,6 +11,7 @@ return [
     ],
 
     'nav' => [
+        'mail_preview' => 'Mail preview',
         'inbox' => 'Inbox',
         'mail_log' => 'Mail sent',
         'templates' => 'Mail templates',
diff --git a/lang/en/checkout.php b/lang/en/checkout.php
index 146113e..9d8ecb4 100644
--- a/lang/en/checkout.php
+++ b/lang/en/checkout.php
@@ -21,5 +21,5 @@ return [
     // even when it is against our own interest. Nothing turns on the consent
     // now; it stays as a record that the customer asked us to start at once.
     'immediate_start' => 'I expressly request that you begin providing the service before the 14-day withdrawal period has ended. My right of withdrawal is unaffected: if I withdraw within the period I get the full amount paid back.',
-    'immediate_start_required' => 'Please confirm that the service should begin at once — otherwise we can only build your cloud once the withdrawal period has ended.',
+    'immediate_start_required' => 'Without this confirmation the order cannot go through — your cloud is built as soon as the payment lands, and there is no start fourteen days later. Your right of withdrawal is unaffected: if you withdraw within the period you get the full amount back.',
 ];
diff --git a/lang/en/mail_preview.php b/lang/en/mail_preview.php
new file mode 100644
index 0000000..36f4667
--- /dev/null
+++ b/lang/en/mail_preview.php
@@ -0,0 +1,12 @@
+<?php
+
+// Looking at a mail before a customer does.
+return [
+    'title' => 'Mail preview',
+    'subtitle' => 'Every message this installation sends, filled with sample data. Opening it in the browser answers the desktop question; sending it to yourself as a real mail is the only way to judge it on a phone.',
+    'open' => 'In the browser',
+    'send' => 'Send to me',
+    'sent' => 'Preview sent to :email.',
+    'failed' => 'Could not be sent: :reason',
+    'note' => 'Always sent to your own address (:email) — there is deliberately no recipient field. The sample data is invented and is not stored.',
+];
diff --git a/lang/en/order.php b/lang/en/order.php
index a480d2d..0964e64 100644
--- a/lang/en/order.php
+++ b/lang/en/order.php
@@ -9,6 +9,7 @@ return [
 
     'recommended' => 'Recommended',
     'consent_title' => 'Immediate start — please confirm',
+    'consent_why' => 'Without this confirmation the order cannot go through. There is no later start: your cloud is built as soon as the payment lands — and you keep your right of withdrawal in full.',
     'consent_first' => 'Please confirm above first.',
     'up_to' => 'up to :count',
     'per_month' => '/month',
diff --git a/resources/views/components/mail/layout.blade.php b/resources/views/components/mail/layout.blade.php
index 3420f0e..5597d80 100644
--- a/resources/views/components/mail/layout.blade.php
+++ b/resources/views/components/mail/layout.blade.php
@@ -28,7 +28,12 @@
 <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="background-color:#f6f6f8;border-collapse:collapse;">
 <tr><td align="center" style="padding:32px 16px;">
 
-  <table role="presentation" width="600" cellpadding="0" cellspacing="0" border="0" style="width:600px;max-width:600px;border-collapse:collapse;font-family:'IBM Plex Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,Arial,sans-serif;">
+  {{-- FLUID, with 600 as a ceiling rather than a floor. width="600" plus
+       width:600px forced every phone to scroll sideways to read a sentence —
+       reported exactly that way. A mail cannot rely on a media query (Outlook
+       renders with Word and drops <style> blocks, which is why this file is
+       inline attributes throughout), so the layout has to shrink by itself. --}}
+  <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="width:100%;max-width:600px;border-collapse:collapse;font-family:'IBM Plex Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,Arial,sans-serif;">
 
     <tr><td style="padding:0 0 20px 4px;">
       <table role="presentation" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
@@ -48,7 +53,7 @@
     <tr><td style="background-color:#ffffff;border:1px solid #e9e9ee;border-radius:12px;">
       <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
 
-        <tr><td style="padding:40px 40px 0 40px;">
+        <tr><td style="padding:40px 24px 0 24px;">
           <h1 style="margin:0 0 14px 0;font-size:25px;line-height:32px;font-weight:700;color:#17171c;letter-spacing:-0.5px;">{{ $heading }}</h1>
           @if ($greeting)
             <p style="margin:0 0 8px 0;font-size:15px;line-height:24px;color:#43434e;">{{ $greeting }}</p>
diff --git a/resources/views/livewire/admin/mail-preview.blade.php b/resources/views/livewire/admin/mail-preview.blade.php
new file mode 100644
index 0000000..e7fdc56
--- /dev/null
+++ b/resources/views/livewire/admin/mail-preview.blade.php
@@ -0,0 +1,42 @@
+<div class="mx-auto max-w-[1120px] space-y-5">
+    <div class="animate-rise">
+        <h1 class="text-2xl font-bold tracking-tight text-ink">{{ __('mail_preview.title') }}</h1>
+        <p class="mt-1 max-w-[70ch] text-sm leading-relaxed text-muted">{{ __('mail_preview.subtitle') }}</p>
+    </div>
+
+    {{-- A preview that goes nowhere is worse than none: the browser view still
+         works, and "senden" would write to a file and report success. --}}
+    @if (! $delivers)
+        <x-ui.alert variant="warning">
+            {{ __('admin.notice.mail_not_delivering', ['mailer' => (string) (config('mail.default') ?? 'null')]) }}
+        </x-ui.alert>
+    @endif
+
+    <div class="overflow-hidden rounded-lg border border-line bg-surface shadow-xs animate-rise [animation-delay:60ms]">
+        <ul class="divide-y divide-line">
+            @foreach ($previews as $key => $label)
+                <li wire:key="prev-{{ $key }}" class="flex flex-wrap items-center gap-3 px-6 py-4">
+                    <div class="min-w-0 flex-1">
+                        <p class="text-sm font-medium text-ink">{{ $label }}</p>
+                        <p class="font-mono text-xs text-muted">{{ $key }}</p>
+                    </div>
+
+                    {{-- A new tab, not an iframe: a mail is a whole document with
+                         its own background, and judging it inside a console page
+                         judges the console's frame around it. --}}
+                    <x-ui.button :href="route('admin.mail.preview.show', $key)" variant="secondary" size="sm" target="_blank">
+                        <x-ui.icon name="external-link" class="size-4" />{{ __('mail_preview.open') }}
+                    </x-ui.button>
+
+                    <x-ui.button wire:click="sendToMe('{{ $key }}')" variant="primary" size="sm"
+                                 wire:loading.attr="disabled" wire:target="sendToMe('{{ $key }}')"
+                                 :disabled="! $delivers">
+                        <x-ui.icon name="send" class="size-4" />{{ __('mail_preview.send') }}
+                    </x-ui.button>
+                </li>
+            @endforeach
+        </ul>
+    </div>
+
+    <p class="text-xs leading-relaxed text-muted">{{ __('mail_preview.note', ['email' => $me]) }}</p>
+</div>
diff --git a/resources/views/livewire/order.blade.php b/resources/views/livewire/order.blade.php
index 78fb08e..20c1648 100644
--- a/resources/views/livewire/order.blade.php
+++ b/resources/views/livewire/order.blade.php
@@ -51,6 +51,12 @@
                 <span class="min-w-0">
                     <span class="block text-sm font-semibold text-ink">{{ __('order.consent_title') }}</span>
                     <span class="mt-1 block text-xs leading-relaxed text-body">{{ __('checkout.immediate_start') }}</span>
+                    {{-- What happens if it is left unticked, said here rather than
+                         only in the refusal afterwards. The box reads like a
+                         choice between "now" and "in fourteen days", and there is
+                         no second option: nothing here delivers later, so an
+                         unticked box means no order at all. --}}
+                    <span class="mt-2 block text-xs leading-relaxed text-muted">{{ __('order.consent_why') }}</span>
                 </span>
             </label>
 
diff --git a/resources/views/mail/cloud-ready.blade.php b/resources/views/mail/cloud-ready.blade.php
index a2cab14..643e016 100644
--- a/resources/views/mail/cloud-ready.blade.php
+++ b/resources/views/mail/cloud-ready.blade.php
@@ -4,14 +4,14 @@
     :greeting="$name ? __('provisioning.mail.ready_greeting_name', ['name' => $name]) : null"
 >
 
-<tr><td style="padding:0 40px 24px 40px;">
+<tr><td style="padding:0 24px 24px 24px;">
     <p style="margin:0;font-size:15px;line-height:24px;color:#43434e;">{{ __('provisioning.mail.ready_line') }}</p>
 </td></tr>
 
 {{-- What was actually built, as a table. Somebody who ordered a fortnight ago
      is checking this against what they bought, and that is a comparison
      rather than a sentence. --}}
-<tr><td style="padding:0 40px;">
+<tr><td style="padding:0 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;background-color:#fafafb;border:1px solid #e9e9ee;border-radius:8px;">
         <tr>
             <td style="padding:14px 16px 6px 16px;font-size:13px;line-height:20px;color:#6e6e7a;width:34%;">{{ __('provisioning.mail.field_address') }}</td>
@@ -36,7 +36,7 @@
      recipient to hunt for one. It used to travel in this mail: across
      third-party mail servers, then sitting in an inbox for ever. It now waits
      behind the sign-in and is deleted once acknowledged. --}}
-<tr><td style="padding:24px 40px 0 40px;">
+<tr><td style="padding:24px 24px 0 24px;">
     <p style="margin:0 0 16px 0;font-size:15px;line-height:24px;color:#43434e;">{{ __('provisioning.mail.ready_credentials') }}</p>
     <table role="presentation" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td align="center" bgcolor="#b8500a" style="background-color:#b8500a;border-radius:8px;">
@@ -45,7 +45,7 @@
     </table>
 </td></tr>
 
-<tr><td style="padding:24px 40px 32px 40px;">
+<tr><td style="padding:24px 24px 32px 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td style="border-top:1px solid #e9e9ee;padding-top:20px;">
             <p style="margin:0;font-size:13px;line-height:20px;color:#6e6e7a;">{{ __('provisioning.mail.ready_help') }}</p>
diff --git a/resources/views/mail/invoice.blade.php b/resources/views/mail/invoice.blade.php
index aec1f33..5d61454 100644
--- a/resources/views/mail/invoice.blade.php
+++ b/resources/views/mail/invoice.blade.php
@@ -4,11 +4,11 @@
     :greeting="$name ? __('invoice_mail.greeting', ['name' => $name]) : null"
 >
 
-<tr><td style="padding:0 40px 24px 40px;">
+<tr><td style="padding:0 24px 24px 24px;">
     <p style="margin:0;font-size:15px;line-height:24px;color:#43434e;">{{ __('invoice_mail.intro') }}</p>
 </td></tr>
 
-<tr><td style="padding:0 40px;">
+<tr><td style="padding:0 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;background-color:#fafafb;border:1px solid #e9e9ee;border-radius:8px;">
         <tr>
             <td style="padding:14px 16px 6px 16px;font-size:13px;line-height:20px;color:#6e6e7a;width:38%;">{{ __('invoice_mail.field_number') }}</td>
@@ -32,12 +32,12 @@
 </td></tr>
 
 @if ($paymentTerms)
-<tr><td style="padding:20px 40px 0 40px;">
+<tr><td style="padding:20px 24px 0 24px;">
     <p style="margin:0;font-size:15px;line-height:24px;color:#43434e;">{{ $paymentTerms }}</p>
 </td></tr>
 @endif
 
-<tr><td style="padding:24px 40px 0 40px;">
+<tr><td style="padding:24px 24px 0 24px;">
     <table role="presentation" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td align="center" bgcolor="#b8500a" style="background-color:#b8500a;border-radius:8px;">
             <a href="{{ $invoicesUrl }}" style="display:inline-block;padding:13px 26px;font-family:'IBM Plex Sans',-apple-system,Helvetica,Arial,sans-serif;font-size:15px;line-height:20px;font-weight:600;color:#ffffff;text-decoration:none;border-radius:8px;">{{ __('invoice_mail.action') }}</a>
@@ -45,7 +45,7 @@
     </table>
 </td></tr>
 
-<tr><td style="padding:24px 40px 32px 40px;">
+<tr><td style="padding:24px 24px 32px 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td style="border-top:1px solid #e9e9ee;padding-top:20px;">
             <p style="margin:0;font-size:13px;line-height:20px;color:#6e6e7a;">{{ __('invoice_mail.attached') }}</p>
diff --git a/resources/views/mail/maintenance-announcement.blade.php b/resources/views/mail/maintenance-announcement.blade.php
index a355b27..b735c70 100644
--- a/resources/views/mail/maintenance-announcement.blade.php
+++ b/resources/views/mail/maintenance-announcement.blade.php
@@ -4,14 +4,14 @@
     :greeting="__('maintenance.mail_greeting', ['name' => $name])"
 >
 
-<tr><td style="padding:0 40px 20px 40px;">
+<tr><td style="padding:0 24px 20px 24px;">
     <p style="margin:0;font-size:15px;line-height:24px;color:#17171c;font-weight:600;">{{ $title }}</p>
 </td></tr>
 
 {{-- The window as its own block rather than inside a sentence. The one thing
      the reader is looking for is when, and a date buried in prose has to be
      found before it can be read. --}}
-<tr><td style="padding:0 40px;">
+<tr><td style="padding:0 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;background-color:#fafafb;border:1px solid #e9e9ee;border-radius:8px;">
         <tr>
             <td style="padding:14px 16px 6px 16px;font-size:13px;line-height:20px;color:#6e6e7a;width:26%;">{{ __('maintenance.mail_field_start') }}</td>
@@ -25,12 +25,12 @@
 </td></tr>
 
 @if ($description)
-<tr><td style="padding:20px 40px 0 40px;">
+<tr><td style="padding:20px 24px 0 24px;">
     <p style="margin:0;font-size:15px;line-height:24px;color:#43434e;">{{ $description }}</p>
 </td></tr>
 @endif
 
-<tr><td style="padding:24px 40px 32px 40px;">
+<tr><td style="padding:24px 24px 32px 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td style="border-top:1px solid #e9e9ee;padding-top:20px;">
             <p style="margin:0;font-size:13px;line-height:20px;color:#6e6e7a;">{{ __('maintenance.mail_no_action') }}</p>
diff --git a/resources/views/mail/maintenance-cancelled.blade.php b/resources/views/mail/maintenance-cancelled.blade.php
index 4f611aa..829b490 100644
--- a/resources/views/mail/maintenance-cancelled.blade.php
+++ b/resources/views/mail/maintenance-cancelled.blade.php
@@ -4,7 +4,7 @@
     :greeting="__('maintenance.mail_greeting', ['name' => $name])"
 >
 
-<tr><td style="padding:0 40px 32px 40px;">
+<tr><td style="padding:0 24px 32px 24px;">
     <p style="margin:0;font-size:15px;line-height:24px;color:#43434e;">{{ __('maintenance.mail_cancel_body', ['title' => $title]) }}</p>
 </td></tr>
 
diff --git a/resources/views/mail/new-device.blade.php b/resources/views/mail/new-device.blade.php
index 023c556..01fd013 100644
--- a/resources/views/mail/new-device.blade.php
+++ b/resources/views/mail/new-device.blade.php
@@ -4,13 +4,13 @@
     :greeting="$name !== '' ? __('devices.mail_greeting', ['name' => $name]) : null"
 >
 
-<tr><td style="padding:0 40px 24px 40px;">
+<tr><td style="padding:0 24px 24px 24px;">
     <p style="margin:0;font-size:15px;line-height:24px;color:#43434e;">{{ __('devices.mail_intro') }}</p>
 </td></tr>
 
 {{-- The facts, as a table rather than a sentence: the reader is checking
      whether this was them, and that is a comparison, not a story. --}}
-<tr><td style="padding:0 40px;">
+<tr><td style="padding:0 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;background-color:#fafafb;border:1px solid #e9e9ee;border-radius:8px;">
         <tr>
             <td style="padding:14px 16px 6px 16px;font-size:13px;line-height:20px;color:#6e6e7a;width:38%;">{{ __('devices.field_device') }}</td>
@@ -27,7 +27,7 @@
     </table>
 </td></tr>
 
-<tr><td style="padding:24px 40px 0 40px;">
+<tr><td style="padding:24px 24px 0 24px;">
     <p style="margin:0 0 16px 0;font-size:15px;line-height:24px;color:#43434e;">{{ __('devices.mail_if_you') }}</p>
     <table role="presentation" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td align="center" bgcolor="#b8500a" style="background-color:#b8500a;border-radius:8px;">
@@ -36,7 +36,7 @@
     </table>
 </td></tr>
 
-<tr><td style="padding:24px 40px 32px 40px;">
+<tr><td style="padding:24px 24px 32px 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td style="border-top:1px solid #e9e9ee;padding-top:20px;">
             <p style="margin:0;font-size:13px;line-height:20px;color:#6e6e7a;">{{ __('devices.mail_false_alarm') }}</p>
diff --git a/resources/views/mail/operator-message.blade.php b/resources/views/mail/operator-message.blade.php
index c3b310a..66b0208 100644
--- a/resources/views/mail/operator-message.blade.php
+++ b/resources/views/mail/operator-message.blade.php
@@ -4,7 +4,7 @@
     :greeting="__('customer_message.mail_greeting', ['name' => $name])"
 >
 
-<tr><td style="padding:0 40px 32px 40px;">
+<tr><td style="padding:0 24px 32px 24px;">
     {{-- The operator's own words, as they typed them. nl2br over an escaped
          string, never {!! !!}: this text comes out of a form, and a message
          somebody pastes in must not be able to bring markup into a mail we
diff --git a/resources/views/mail/order-confirmation.blade.php b/resources/views/mail/order-confirmation.blade.php
index 354cae4..9a92f47 100644
--- a/resources/views/mail/order-confirmation.blade.php
+++ b/resources/views/mail/order-confirmation.blade.php
@@ -4,11 +4,11 @@
     :greeting="$name ? __('orders.mail_greeting', ['name' => $name]) : null"
 >
 
-<tr><td style="padding:0 40px 24px 40px;">
+<tr><td style="padding:0 24px 24px 24px;">
     <p style="margin:0;font-size:15px;line-height:24px;color:#43434e;">{{ __('orders.mail_intro') }}</p>
 </td></tr>
 
-<tr><td style="padding:0 40px;">
+<tr><td style="padding:0 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;background-color:#fafafb;border:1px solid #e9e9ee;border-radius:8px;">
         <tr>
             <td style="padding:14px 16px 6px 16px;font-size:13px;line-height:20px;color:#6e6e7a;width:34%;">{{ __('orders.field_product') }}</td>
@@ -32,7 +32,7 @@
 {{-- What happens next, without naming a time. Provisioning takes as long as it
      takes and CloudReady announces the end of it; a promised minute that slips
      is worse than no promise. --}}
-<tr><td style="padding:24px 40px 0 40px;">
+<tr><td style="padding:24px 24px 0 24px;">
     <p style="margin:0 0 16px 0;font-size:15px;line-height:24px;color:#43434e;">{{ __('orders.mail_next') }}</p>
     <table role="presentation" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td align="center" bgcolor="#b8500a" style="background-color:#b8500a;border-radius:8px;">
@@ -41,7 +41,7 @@
     </table>
 </td></tr>
 
-<tr><td style="padding:24px 40px 32px 40px;">
+<tr><td style="padding:24px 24px 32px 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td style="border-top:1px solid #e9e9ee;padding-top:20px;">
             <p style="margin:0;font-size:13px;line-height:20px;color:#6e6e7a;">{{ __('orders.mail_help') }}</p>
diff --git a/resources/views/mail/reset-password.blade.php b/resources/views/mail/reset-password.blade.php
index 8293742..67012fd 100644
--- a/resources/views/mail/reset-password.blade.php
+++ b/resources/views/mail/reset-password.blade.php
@@ -4,11 +4,11 @@
     :greeting="$name ? __('reset_password.greeting', ['name' => $name]) : null"
 >
 
-<tr><td style="padding:0 40px 24px 40px;">
+<tr><td style="padding:0 24px 24px 24px;">
     <p style="margin:0;font-size:15px;line-height:24px;color:#43434e;">{{ __('reset_password.intro') }}</p>
 </td></tr>
 
-<tr><td style="padding:0 40px;">
+<tr><td style="padding:0 24px;">
     <table role="presentation" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td align="center" bgcolor="#b8500a" style="background-color:#b8500a;border-radius:8px;">
             <a href="{{ $url }}" style="display:inline-block;padding:13px 26px;font-family:'IBM Plex Sans',-apple-system,Helvetica,Arial,sans-serif;font-size:15px;line-height:20px;font-weight:600;color:#ffffff;text-decoration:none;border-radius:8px;">{{ __('reset_password.action') }}</a>
@@ -21,7 +21,7 @@
      corporate mail gateways rewrite button links and some of them fetch the
      target first to scan it, which on a single-use link spends it before the
      recipient ever clicks. --}}
-<tr><td style="padding:28px 40px 0 40px;">
+<tr><td style="padding:28px 24px 0 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;background-color:#fafafb;border:1px solid #e9e9ee;border-radius:8px;">
         <tr><td style="padding:14px 16px;">
             <p style="margin:0 0 6px 0;font-size:12px;line-height:16px;color:#6e6e7a;">{{ __('reset_password.fallback') }}</p>
@@ -34,7 +34,7 @@
      NOT ask for it has just learned that a stranger knows their address, and
      the right advice is "do nothing" — not "contact us immediately", which is
      what a phishing copy would say. --}}
-<tr><td style="padding:24px 40px 0 40px;">
+<tr><td style="padding:24px 24px 0 24px;">
     <p style="margin:0;font-size:13px;line-height:20px;color:#6e6e7a;">{{ __('reset_password.not_you') }}</p>
 </td></tr>
 
diff --git a/resources/views/mail/verify-email.blade.php b/resources/views/mail/verify-email.blade.php
index d0350b1..7246908 100644
--- a/resources/views/mail/verify-email.blade.php
+++ b/resources/views/mail/verify-email.blade.php
@@ -4,11 +4,11 @@
     :greeting="$name ? __('verify_email.greeting', ['name' => $name]) : null"
 >
 
-<tr><td style="padding:0 40px 24px 40px;">
+<tr><td style="padding:0 24px 24px 24px;">
     <p style="margin:0;font-size:15px;line-height:24px;color:#43434e;">{{ __('verify_email.intro') }}</p>
 </td></tr>
 
-<tr><td style="padding:0 40px;">
+<tr><td style="padding:0 24px;">
     <table role="presentation" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td align="center" bgcolor="#b8500a" style="background-color:#b8500a;border-radius:8px;">
             <a href="{{ $url }}" style="display:inline-block;padding:13px 26px;font-family:'IBM Plex Sans',-apple-system,Helvetica,Arial,sans-serif;font-size:15px;line-height:20px;font-weight:600;color:#ffffff;text-decoration:none;border-radius:8px;">{{ __('verify_email.action') }}</a>
@@ -20,7 +20,7 @@
 {{-- The link as text as well. Corporate mail gateways rewrite button links and
      some of them fetch the target first to scan it — on a single-use link that
      burns the confirmation before the recipient ever sees it. --}}
-<tr><td style="padding:28px 40px 0 40px;">
+<tr><td style="padding:28px 24px 0 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;background-color:#fafafb;border:1px solid #e9e9ee;border-radius:8px;">
         <tr><td style="padding:14px 16px;">
             <p style="margin:0 0 6px 0;font-size:12px;line-height:16px;color:#6e6e7a;">{{ __('verify_email.fallback') }}</p>
@@ -29,7 +29,7 @@
     </table>
 </td></tr>
 
-<tr><td style="padding:24px 40px 32px 40px;">
+<tr><td style="padding:24px 24px 32px 24px;">
     <table role="presentation" width="100%" cellpadding="0" cellspacing="0" border="0" style="border-collapse:collapse;">
         <tr><td style="border-top:1px solid #e9e9ee;padding-top:20px;">
             <p style="margin:0;font-size:13px;line-height:20px;color:#6e6e7a;">{{ __('verify_email.not_you') }}</p>
diff --git a/routes/admin.php b/routes/admin.php
index 692445a..c236e5e 100644
--- a/routes/admin.php
+++ b/routes/admin.php
@@ -45,6 +45,20 @@ Route::get('/finance', Admin\Finance::class)->name('finance');
 Route::get('/customers/{uuid}', Admin\CustomerDetail::class)->name('customer');
 // What customers wrote to us — see Admin\Inbox.
 Route::get('/inbox', Admin\Inbox::class)->name('inbox');
+// Looking at a mail before a customer does. The list is a page; the render is a
+// plain response, because a mail is a whole document and belongs in its own tab.
+Route::get('/mail/preview', Admin\MailPreview::class)->name('mail.preview');
+Route::get('/mail/preview/{key}', function (string $key) {
+    abort_unless(auth('operator')->user()?->can('mail.manage') ?? false, 403);
+
+    $mailable = app(App\Services\Mail\MailPreviews::class)->make($key);
+
+    abort_if($mailable === null, 404);
+
+    // The rendered mail, as the recipient's client would get it. Not escaped
+    // into a console page: this is the document itself.
+    return response($mailable->render());
+})->name('mail.preview.show');
 // The answers an operator gives over and over, written once — see
 // Admin\MailTemplates.
 Route::get('/mail-templates', Admin\MailTemplates::class)->name('templates');
diff --git a/tests/Feature/Admin/MailPreviewTest.php b/tests/Feature/Admin/MailPreviewTest.php
new file mode 100644
index 0000000..a980903
--- /dev/null
+++ b/tests/Feature/Admin/MailPreviewTest.php
@@ -0,0 +1,130 @@
+<?php
+
+use App\Livewire\Admin\MailPreview;
+use App\Models\Invoice;
+use App\Models\MaintenanceWindow;
+use App\Models\Order;
+use App\Services\Mail\MailPreviews;
+use Illuminate\Support\Facades\Mail;
+use Livewire\Livewire;
+
+/**
+ * Looking at a mail before a customer does.
+ *
+ * There was no way to: an invoice mail needs an invoice, a maintenance
+ * announcement needs a window, and "register an account to see whether the
+ * confirmation reads well on a phone" is not a workflow. Which is how every mail
+ * went out with a hard 600px table until somebody opened one on a telephone.
+ */
+it('renders every mail this installation sends', function () {
+    // The whole point of the list: a mail that cannot be rendered is one nobody
+    // finds out about until the event that sends it happens for real.
+    $previews = app(MailPreviews::class);
+
+    expect($previews->all())->not->toBeEmpty();
+
+    foreach (array_keys($previews->all()) as $key) {
+        $html = $previews->make($key)?->render();
+
+        expect($html)->toBeString()
+            ->and(strlen((string) $html))->toBeGreaterThan(500);
+    }
+});
+
+it('leaves nothing behind in the database', function () {
+    // make(), never create(). A preview must not leave an invoice, an order or a
+    // maintenance window lying about — least of all one carrying a number drawn
+    // from a series.
+    $before = [
+        'invoices' => Invoice::query()->count(),
+        'orders' => Order::query()->count(),
+        'windows' => MaintenanceWindow::query()->count(),
+    ];
+
+    foreach (array_keys(app(MailPreviews::class)->all()) as $key) {
+        app(MailPreviews::class)->make($key)?->render();
+    }
+
+    expect(Invoice::query()->count())->toBe($before['invoices'])
+        ->and(Order::query()->count())->toBe($before['orders'])
+        ->and(MaintenanceWindow::query()->count())->toBe($before['windows']);
+});
+
+it('answers nothing for a key nobody knows, rather than throwing', function () {
+    // Reached from a URL, and a URL is a string somebody can retype.
+    expect(app(MailPreviews::class)->make('gibt-es-nicht'))->toBeNull();
+});
+
+it('sends a preview to the operator own address and to nobody else', function () {
+    Mail::fake();
+
+    $operator = operator('Owner');
+
+    Livewire::actingAs($operator, 'operator')
+        ->test(MailPreview::class)
+        ->call('sendToMe', 'verify-email')
+        ->assertDispatched('notify');
+
+    // SENT, not queued. Every mailable here implements ShouldQueue, so send()
+    // would have deferred to the queue — putting a failure in a worker's log
+    // while the button reported success to somebody who is waiting for the mail.
+    Mail::assertSent(App\Mail\VerifyEmailMail::class, fn ($mail) => $mail->hasTo($operator->email));
+    Mail::assertNotQueued(App\Mail\VerifyEmailMail::class);
+});
+
+it('has no recipient field, because that would be a form for mailing strangers', function () {
+    $component = Illuminate\Support\Facades\File::get(app_path('Livewire/Admin/MailPreview.php'));
+
+    // The address comes from the signed-in operator, never from the request.
+    expect($component)->toContain("Auth::guard('operator')->user()")
+        ->and($component)->not->toContain('public string $to');
+});
+
+it('serves the rendered mail as the document itself', function () {
+    // Not escaped into a console page: a mail is a whole document with its own
+    // background, and judging it inside a frame judges the frame.
+    $this->actingAs(operator('Owner'), 'operator')
+        ->get(route('admin.mail.preview.show', 'verify-email'))
+        ->assertOk()
+        ->assertSee('max-width:600px', false);
+});
+
+it('keeps the preview to operators who may manage mail', function () {
+    Livewire::actingAs(operator('Read-only'), 'operator')
+        ->test(MailPreview::class)
+        ->assertForbidden();
+
+    $this->actingAs(operator('Read-only'), 'operator')
+        ->get(route('admin.mail.preview.show', 'verify-email'))
+        ->assertForbidden();
+});
+
+it('answers 404 for a preview that does not exist', function () {
+    $this->actingAs(operator('Owner'), 'operator')
+        ->get(route('admin.mail.preview.show', 'gibt-es-nicht'))
+        ->assertNotFound();
+});
+
+// ---- What made this necessary ----
+
+it('builds the mail layout fluid, so a phone does not scroll sideways', function () {
+    // width="600" plus width:600px forced every phone to scroll to read a
+    // sentence. A mail cannot rely on a media query — Outlook renders with Word
+    // and drops <style> blocks — so the layout has to shrink by itself.
+    $html = (string) app(MailPreviews::class)->make('verify-email')?->render();
+
+    expect($html)->toContain('width:100%;max-width:600px')
+        ->and($html)->not->toContain('width="600"')
+        // No fixed width anywhere, and max-width does not count as one.
+        ->and(preg_match('/style="[^"]*(?<!max-)width:600px/', $html))->toBe(0);
+});
+
+it('does not spend a third of a phone screen on side padding', function () {
+    // 40px each side leaves 278px of a 390px screen. 24px leaves 310px, and on
+    // the desktop 552px of a 600px canvas still reads well.
+    foreach (array_keys(app(MailPreviews::class)->all()) as $key) {
+        $html = (string) app(MailPreviews::class)->make($key)?->render();
+
+        expect(preg_match('/padding:[^";]*\b40px\b[^";]*40px/', $html))->toBe(0, $key);
+    }
+});
diff --git a/tests/Feature/Portal/GrantedPlanPortalTest.php b/tests/Feature/Portal/GrantedPlanPortalTest.php
index a694f19..e16bd02 100644
--- a/tests/Feature/Portal/GrantedPlanPortalTest.php
+++ b/tests/Feature/Portal/GrantedPlanPortalTest.php
@@ -45,7 +45,12 @@ it('shows the granted plan on the cloud dashboard without a price', function ()
 
     Livewire::actingAs($user)
         ->test(Cloud::class)
-        ->assertDontSee('179')
+        // The formatted amount, not the bare digits: "179" also matches an id,
+        // and ids climb through a suite run because a rolled-back transaction
+        // does not reset an auto-increment counter. That made this test pass
+        // alone and fail in company. The line below is what a leak would
+        // actually look like on the page.
+        ->assertDontSee('179,00')
         ->assertDontSee('0 €')
         ->assertSee(__('billing.plan.team'));
 });
diff --git a/tests/Feature/SelfServiceOrderTest.php b/tests/Feature/SelfServiceOrderTest.php
index b1e5468..755f6a7 100644
--- a/tests/Feature/SelfServiceOrderTest.php
+++ b/tests/Feature/SelfServiceOrderTest.php
@@ -318,3 +318,17 @@ it('still refuses the checkout when the box was not ticked', function () {
 
     expect($this->stripe->checkouts)->toBeEmpty();
 });
+
+it('renders inside the app shell, not the bare sign-in one', function () {
+    // layouts.portal is what the sign-in pages use: no navigation, no page
+    // padding. In it, this page sat flush against the top and bottom of the
+    // window with no way back to anything.
+    expect(Illuminate\Support\Facades\File::get(app_path('Livewire/Order.php')))
+        ->toContain("#[Layout('layouts.portal-app')]");
+
+    // And the shell is actually there: the navigation proves it.
+    $this->actingAs(buyer())
+        ->get(route('order'))
+        ->assertOk()
+        ->assertSee(__('dashboard.nav.overview'));
+});