I am using RapidFax to send internet faxes via my mail client, Outlook
2003. Everytime I send an internet fax from Outlook 2003 through my
work e-mail account, I get a message from RapidFax stating that I must
be a registered user.

I can go on-line and use their on-line utility to send a fax without a
problem.

If I change my outgoing mail server to my personal e-mail account
settings, then I am able to send without a problem.

I figure that this is probably a problem with how my work outgoing mail
server is sending this to the fax service server, but can't get to the
bottom of it. I have tried troubleshooting with RapidFax and my work
ISP with no luck.

Has anyone had or heard of a similar issue or perhaps have an idea?