Hello,

from time to time we are getting this message in our exim logs:

LMTP error after end of data: 554 5.6.0 Message contains invalid header

I have also experienced this error while I'm syncing emails from an old server to our new cyrus mailserver. I have

munge8bit: false

in my imapd.conf and reject8bit is set to "false" by default. Which headers is cyrus complaining about? I cannot change this world where clients like Notus Notes are sending invalid emails, but simply refusing these mails is a bad choice. And we also have a lot of emails we received in the old setup and I wouldn't know how to explain to our users, that they cannot access these messages any more.

How can I make cyrus less strict?

Regards
Marten
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