Hi,

I have just discovered that the IMAP account setup wizard in outlook 2019 assumes that the email address for a user is the same as their username, and there is no easy way to separately enter different user. (It can be done via hidden dialog boxes, command line switches and registry hacking, but it is far from easy [1])

Like many small setups, the dovecot accounts on my mail server map directly to unix accounts on the machine, and the IMAP password for each account is the same as the unix login password.

I have now got outlook sorted and talking to my IMAP server, but seeing as this issue will almost certainly arise again, with out over-simplified MUA software, is there a setting in dovecot that if it is given an email address as a login username it strips off the domain part, and tests the user part against the password supplied?

If you know how to do that for postfix for sending email, then even better!

[1] https://superuser.com/questions/1391960/how-to-enter-username-of-imap-account-in-outlook-2016