Manuel Davila wrote:

I have a customer with an e-mail account setup with Comcast/Broadband.
However at the office they use DSL/Bellsouth. At the office in Outlook
(2003) they can RECEIVE all emails (Comcast's) but they are not able
to SEND (error: something like: outgoing server not found), I changed
the Outgoing Server to: mail.bellsouth.net, but still unable to send.
I suggested using the Comcast web mail based solution, but they want
to use Outlook.

It's quite possible that the company firewall blocks access to other mail
servers. Ask the people who maintain the firewall.
--
Brian Tillman