in reply to Problem passing ESMTP username/password through MIME::Enity
I notice that where you should have a login/username you put an email address instead: "me@whatever.net". Normally you would send just "me" as the login and then the password.
I don't know if this will solve your problem or not, maybe when writing your post you typo'd the entire address instead of the login.
--Jim
In Section
Seekers of Perl Wisdom