Rated 4 out of 5 stars

I couldn't find any support e-mail or forums, so I'm writing here.Unfortunately, in Thunderbird it works correctly only for IMAP authentication. POP authentication seems to be unaffected and SMTP authentication doesn't show the server hostname.I'd also like to have the URI scheme included (e.g. smtp://, imap://, pop3://).

EDIT] I tried to change the usernames according to your advice and it mostly worked, but I can't log into my university account with the new username.

This review is for a previous version of the add-on (2.0.0.1-signed.1-signed). 

You can set the 'User Name' in the 'Account Settings' to an email address such as 'foo@example.org' instead of just the user name 'foo'. This way, Thunderbird shows this email address in the authentication dialog message, which the add-on can then parse and, if successful, show in the titlebar. Gmail and Hotmail are known (at the time of writing) to accept an email address as the user name.