I am currently working with a client in houston who created an email address, has all of the correct settings, (I even tried to log onto the email account too.) and it just isn't working.
can't even use webmail.theirdomain.com (but can log into the password changer at mailboxes.theirdomain.com and it lets me log in...I wonder if it is some sort of a glitch in the mailbox username m000000 getting hosed.
I guess it's time for me to add to the DH support Q
PS, it's on the mail server zippy