Hi,

I noticed that all emails that come from Exchange/Office 365 have the message-id, in deliver log, reported as

msgid=? <dbbpr...@dbbpr023.eurprd08.prod.outlook.com>

instead of expected

msgid=<dbbpr...@dbbpr023.eurprd08.prod.outlook.com>

My deliver_log format is:

deliver_log_format = deliverytime=%{delivery_time}, msgid=%m, sender=%e, from=%f, subject="%s": %$

The behaviour is the same on Dovecot 2.2 and 2.3, and only dovecot have the "?", we have a mail filter before dovecot and the message-id is registred fine, without the ? in front.

Is an issue of my setup or a bug in dovecot?
Thanks

--
Alessio Cecchi
Postmaster @ http://www.qboxmail.it
https://www.linkedin.com/in/alessice

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