Exchange server 2003.
Internal AD domain internaldomain.mycompany.com
SMTP E-mail:
No BES; BB e-mail client is configured online (Nextel BB) as IMAP or OWA for each of the five BB's in this organization.

Exchange, by default, sets up not only (primary SMTP address), but (secondary SMTP address).

We have no issues sending e-mail via Outlook or other mail clients, internally or externally. The BB's have no problem sending to outside addresses. However, when BB User1 sends a message to User2 on the same Exchange server, it sends using the instead of .

Why? How do I fix? Do I just have to remove the ? If I recall correctly, this is (or used to be) necessary in order for users to access their messages remotely on a PC via OWA, so I'm not sure I want to start removing those.