>Can you ping your email server from your PC?
Yes

>Are you sure it's DSL and not Cable modem? it may make a difference
I am sure it is a DSL modem

>Do other PCs work fine?

No. Same problem.

>Have you changed any settings int he Linksys router?

No. The Linksys router has not working for sending email since I installed it. Removing the router and counnecting directly to the DSL modem allows email to be sent.