I upgraded kopano-core from Version 220.127.116.113_0+76 to 18.104.22.1680_0+90 today.
Reason was the bug reported on this topic
Upgrade worked and anything looks good besides the circumstance that I’m not able to send e-mails.
If I send a mail, the kopano-spooler logs
Python type: (null) Python error: No module named MAPI K-1733: Unable to initialize the spooler plugin system: Unknown error code (1). Processed message for user XXX@XXXXXX
and the mail stays in the outbox. Tried a few things like changing folder permissions and so on. But anything worked with the last version so I don’t think that this is a problem with the configuration on my server.
OS is Debian9