I am trying to configure postfix/dovecot along with Thunderbird so that I have a secured connection for retrieving/sending emails but so far I was not successful.
I have SSL enabled (self-signed).
In SMTP Autentication and encryption, I have those options:
Require SASL SMTP authentication? [Yes]
SMTP security options
[x] Reject anonymous logins
[x] Reject plain-text logins
I did not set Dovecot yet. Not sure what options I need.
Anyone can help?
Me no sorry.
But please read forum rules, the part of saying post your versions if asking for support. 
Also if errors the output of that log files.
And important configurations then these settings also.
Well I could post the versions but I don’t mind switching version if needed so I am more interested in a ‘standard’ configuration for postfix/dovecot on linux and I am using Thunderbid as my email client. The server is just a basic LAMP using debian.
I guess nobody has time to help.
Is there some documentation somewhere about webmin/dovecot/postfix. I looked at the webmin documentation but it looks like screenshots with no descriptions:
https://doxfer.webmin.com/Webmin/Dovecot_IMAP/POP3_Server
Old and not using good gramar.
Maybe you recognize parts and finding in the links in that topic solutions or anyway things to test or think about
https://www.virtualmin.com/comment/783413#comment-783413