Hello,

I have upgraded debian 8 (postfix 2.11) to debian 9 (postfix 3.1) on a
mailserver.

Now, whenever user who has utf-8 character in /etc/passwd as part of their
username, has to receive mail, postfix outputs:

451 4.3.5 Server configuration error

there are many users who have utf-8 characters in their fullnames there.

changing smtputf8_autodetect_classes to all didn't seem to help.

What to configure (and how) to avoid this error?
I have LANG variable set to "C" because  other values tend do change sorting
etc.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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