EsmtpTransport's autoTls (default true) and requireTls (default false) are independent of the implicit-TLS constructor argument: 'tls' left these at their defaults, so a server that omitted STARTTLS sent mailbox credentials in the clear while reporting success, and 'none' would silently upgrade the moment a server offered STARTTLS. Both MailboxTransport and MailboxTester already duplicated the "ssl, or port 465 ⇒ implicit" half of this decision independently; MailTlsPolicy is now the one place both read, for both dimensions. MailboxTester still builds through Mail::build() rather than a hand-built transport: MailManager::createSmtpTransport() forwards the whole config array to EsmtpTransportFactory as DSN options, which already reads auto_tls/require_tls itself, so the same policy reaches this path through keys the config array already supports. |
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