> 1) Who or what is sending messages like that (without the proper > capability support available at the server side)?
I think that was some sort of commercial mass mailer: List-Unsubscribe: <http://newsletter.jomec.de/rmftlp.php?cid=...> > 2) Why would an MTA accept this message? What software is doing that > (and why)? Postfix. It was just in the headers, so it was not relevvant for delivery. > 3) What does the envelope address look like? Do both header and envelope > have that umlaut (unlikely, because Dovecot should reject that already)? > Maybe this could be fixed by substituting the envelope address if it is > sufficiently similar. Envelope sender is: bounce+15...@bounce.crsend.com > 4) Where does this fail actually? At some point it is trying to > construct an SMTP (RFC 5321) address from the header address (RFC 5322). > Do you have a GDB backtrace with proper symbols? Don't have a backtrace yet, but since the mail is still in the queue I could try getting one. -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebra...@charite.de | https://www.charite.de
