Am Fri, 28 Mar 2025 12:38:02 -0400 schrieb Bill Cole via mailop <mailop@mailop.org>:
> On 2025-03-28 at 11:32:50 UTC-0400 (Fri, 28 Mar 2025 16:32:50 +0100) > Marco Moock via mailop <m...@dorfdsl.de> > is rumored to have said: > > > Hello! > > > > When trying to deliver DMARC reports to <dm...@u64.de>, I get > > > > ----- The following addresses had permanent fatal errors ----- > > <dm...@u64.de> > > (reason: 550 This address does not send an unsigned return > > path.) > > > > What does this message mean? > > > > SMTP MAIL FROM is from=<postmas...@dorfdsl.de > > Return-Path: <postmas...@dorfdsl.de> > > FWIW, those two are usually tightly bound: the Return-Path header > does not normally exist until it gets created when the message is > delivered *out* of SMTP (e.g. to a mailbox.) What can be be varied is > the "From:" *header* address. The message is a DMARC report generated by opendmarc on my machine (srv1.dorfdsl.de) > Most likely they have implemented BATV to reject bogus bounces. BATV > assures that all mail with a "From" header of postmas...@dorfdsl.de > will have a SMTP sender address with a keyed modification of the > "real" address. This is rather confusing for me. I don't use BATV at all - neither I use such addresses nor do I validate that in any way. _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
