I cannot get IMAP Mail Clients - eg Thunderbird and Outlook - to authenticate to the server. They just show an error:
mail dovecot: imap-login: Disconnected (no auth attempts in 0 secs): user=<>, rip=192.168.1.2, lip=192.168.1.253, TLS, session=
They find the server and its settings correctly but fail to complete with the above error (from the /var/log/imap log) each time they try.
It is a clean install with just the Active Directory setup and the mail server and horde installed;
Horde works perfectly. I also tried running webtob and sogo and they also work perfectly via their webclient.
It is a standalone server without gateway.
I have tried connecting the client using IP addresses and domain name on the LAN and WAN;
It is a FQDN with correct routing and SSL installed.
Tried ‘username’ and ‘username’@‘domain’ all with the same result;
Any suggestions as to what I may be missing? The logs suggest the connection is correct, the clients suggest the username or password is incorrect (checked and double-checked).
NethServer Version: NethServer release 7.6.1810 (final)