Reference Settings for Setting Up IMAP in Thunderbird

I've done some searches of the forum and Google but can't seem to find the answer to the question of what settings we use to set up IMAP on Thunderbird for a domain set up in DA.

Autodetect won't work for me.

What is the Incoming IMAP server? mail.domainname.com? And what port?

What is the Outgoing SMTP server? mail.domainname.com? And what port?

I tried the above options with the standard ports and it did not work for me.

Also, what settings for SSL and Authentication.

For useame is it just firstname.lastname or is it [email protected]?

Thanks in advance.