maybe someone can help.
I have a Kopano environment setup on different Debian 9 server:
1.) Samba4 (Auth)
2.) Kopano Core incl. Spooler …
3.) Sendmail (dual-stack) + Kopano Dagent
I can login on the webapp frontend and send mail to external email adresses. So communication Webapp -> Core -> Sendmail-RX -> AMVAVIS -> Sendmail-TX -> Recepient works. However I cannot arrange to get sendmail to locally deliver internal emails via dagent to the Kopano core server.
I allocated a problem (at least I think), that Kopano Dagent cannot send email to the Core Server due to authentication problems. I figured this out by sending the following cmmand on server 3:
echo .hello. | kopano-dagent -vc /etc/kopano/dagent.cfg USERNAME
Server 2 - Kopano-Server logs:
Sat Apr 28 16:28:51 2018: [debug ] Accepted incoming connection from 172.16.1.18
Sat Apr 28 16:28:51 2018: [warning] Authentication by plugin failed for user “USERNAME”: Trying to authenticate failed: Disallowing NULL password for user CN=XXXX,OU=XXXXXX,DC=XXXXXX,DC=de; username = USERNAME
Unfortunately the docs do not say much about. Anyone has any ideas?