I see there are a lot of older threads with similar problems, but they seem to be for the N900 mostly, or for webmail addresses like gmail. Been banging my head against the wall with our IT guys for weeks now, so hoping someone might have an idea.

I got my work email finally set up and working in Modest on my N800 a few months back. Worked great when I was traveling through Europe. A couple of weeks after I got back we upgraded to a new Exchange server and since then I can receive mail, but not send. I connect through IMAP from Thunderbird at home, and have no problems sending from there, but on the N800 using the same settings I get "SMTP authentication failed." Check user name and password or that you have access to mail.mpglobal.com" My IT guys have tested and they can get mail to work in an iPhone and Symbian phones fine, so they are about to give up on me. Hoping there might be something else I can try.