I'm supporting a user that is a member of a small work group. Windows 7 Pro, with Office 2010 Pro.
The incoming and outgoing server names are correct. The user can send and receive email. But when the recipient of one of his messages attempts to reply, they receive a NDR. In the header of the NDR, it shows the reply to address to be: username@domainnameCOM , no ".com" (dot com).
I've checked to see if there was a different reply to address in the user account settings in Outlook, but there is none. Other users in the work group are sent up the same as the problem user, and they are operating fine.
Any ideas? Thanks in advance Experts.