Scheduled emails in webtop are not sent.
In /var/log/imap I get the following rows (one for each webtop enabled user plus 1 for <> )
Sep 30 20:07:24 fo-n7b2-lab dovecot: imap-login: Disconnected (auth failed, 1 attempts in 2 secs): user=<>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured, session=<nsVAd709iQB/AAAB>
Sep 30 20:07:28 fo-n7b2-lab dovecot: imap: Error: Authenticated user not found from userdb, auth lookup id=2146828289 (client-pid=9104 client-id=1)
Sep 30 20:07:28 fo-n7b2-lab dovecot: imap-login: Internal login failure (pid=9104 id=1) (internal failure, 1 successful auths): user=, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=9105, secured, session=<Vaxfd709igB/AAAB>
Sep 30 20:07:28 fo-n7b2-lab dovecot: imap: Error: Authenticated user not found from userdb, auth lookup id=3887071233 (client-pid=9107 client-id=1)
Sep 30 20:07:28 fo-n7b2-lab dovecot: imap-login: Internal login failure (pid=9107 id=1) (internal failure, 1 successful auths): user=, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=9108, secured, session=<vfKdd709iwB/AAAB>
It must be said that the same problem was present on NG 6.8 and this happens only if mail users are taken from Microsoft AD.
Second question is who is the user <> that fails to authenticate ?
Any clue ?