I’ve just built a new server based on Debian 12. (I was using Ubuntu).
Email is arriving correctly (3 users) but I can not for the life of me work out how to get Thunderbird to grab the messages. My Thunderbird configuration has not changed (worked all OK on the old server).
I did find under usermin >> module configuration >> Read Email … I tried changing a few things in that but no luck at all.
The Directory used for storing (one of the email addresses) is : /home/soft-focus-imagining/homes/nigel/Maildir
Thanks for jumping in on this. Last night I scoured the log files and nailed it down to something not right with Dovecot (I was wrong actually), as it was not able to authorize the connection.
I then tested to see if Port 110 would work. It did but asked for a password. Which was strange because it has not changed. Put in the Password, and mail started uploading. I then switched back to Port 995 and now that works as well.
I think what threw me was that Thunderbird was giving no warning / error messages at all, until I changed to Port 110.