Wow. Awesome. Thats it. Thank you and have a nice day. I totally missed that.
Stefan -----Ursprüngliche Nachricht----- Von: Aaron Richton <rich...@nbcs.rutgers.edu> Gesendet: Montag 10 September 2018 20:36 An: Stefan Bauer <s...@plzk.de> CC: mailop@mailop.org Betreff: Re: [mailop] postfix postmaster wanted - howto instantly bounce when remote site refuses TLS On Mon, 10 Sep 2018, Stefan Bauer wrote: > i know this is not postfix mailing list - but postfix list said - its > not supported yet - so hoping for a trick from postmasters ;) Huh, that's curious, unless they mean "you need Postfix 3.0" perhaps? But anyway... > Sep 9 23:40:35 postfix/smtp[29230]: 988B7809D4: to=<a@b.c>, > relay=mail.b.c[1.2.3.4]:25, delay=18342, delays=18342/0.03/0.1/0, > dsn=4.7.4, status=deferred (TLS is required, but was not offered by host > mail.b.c[1.2.3.4]) This is literaly the example for *_delivery_status_filter in postconf(5) man page, a feature "originally implemented for sites that want to turn certain soft delivery errors into hard delivery errors." Check the Postfix 3.x RELEASE_NOTES under "Major changes - delivery status notifications" for full discussion/examples.
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