Panic: file smtp-address.c: line 530 (smtp_address_write): assertion failed: (smtp_char_is_qpair(*p))

John Fawcett john at
Sun Mar 4 09:28:14 EET 2018

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.müller at>
>> 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.


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