Dear All

I have Postfix version 3.3.0, Dovecot Version 2.2.33.2 and PostfixAdmin version 3.3.10 using MySQL on a small device running Ubuntu VERSION="18.04.6 LTS (Bionic Beaver)" for my internal LAN Mail.

I have a user admin@fsoft.nnet with a mailbox setup in PostfixAdmin with a password as 'Test75?'

Everything is running fine, but I cannot get my Email Client Thunderbird to connect.

I have setup the debugging to see that the correct password is being used, which it is, but I have this error:

dovecot: auth-worker(26468): sql(admin@fsoft.nnet,10.6.10.10,<gB77wjLXGLsKBgoK>): Password mismatch (given password: Test75?)

showing that dovecot disagrees!!!

Why is this? Is it something to do with the permissions in PostfixAdmin?

I did find a post on Server Fault where someone had the same problem. He just tried various passwords until he found one that worked!!!! I have not found any other post about this exact problem.

Any help much appreciated.

Regards

Francis