zkid wrote:

Here's my problem. Email messages with a couple of users in the To:
field are being sent properly. I attempted to send an email to 12
addressees through the account. The message showed up properly in
the sent items folder and is not stuck in the Outlbox (no error
messages occurred).

When a message gets moved to the Sent Items folder, that's a fairly
conclusive sign that the mail server has accepted the outgoing message. The
problem appears to be an AOL server problem, but you can enable diagnostic
logging to make sure.
http://support.microsoft.com/kb/300479/en-us
--
Brian Tillman