Internet on 8525

I reconfigured my phone so that POP3 works, and I receive my optonline
(cablevision) emails. I can not send out emails using that account.
Someone stated that you have to change to cwms.com (is that the
outgoing server name) instead of mail.optonline.net. However, now I
can no longer surf the net. Whenever I click on IE,. POP3 comes up.
The phone is still set up for wap.cingular, so how can I get back to
both web pages and the POP3 account. When I first configured it,
outgoing messages went as myphone#@cingular.com (or net). When I send
a message, it states it sent, but never arrives. Also, it appears that
only the first part of the message arrives. Any attachments gives you
a message, thate full message will be downloaded the next time the POP3
mail is delivered.