On 04/03/18 08:08, A.L.E.C wrote: > On 03/02/2018 03:32 PM, Ralf Hildebrandt wrote: >> The address causing the error is: >> >> From: =?utf-8?Q?Dorit_M=C3=BCller?= <d.mül...@jomec.de> >> >> Note the "umlaut" in the email address... :) > This is about SMTPUTF8 (RFC6531). Looks like your only option is to disable > smtputf8_enable in Postfix config. Of course Dovecot should never panic, so a > fix for this > would be nice, separately from the SMTPUTF8 support. > Postfix already permitted UTF8 in message headers and local part of the address before the introduction of SMTPUTF8 and that has remained so. I don't believe turning off SMTPUTF8 in Postfix will change the behaviour in this case.
John