PPC 2003 Inbox questions

[Ollie03031]

I have a iPAQ 2210 and I have set up my inbox for POP3 exactly like my 3975. Problem is the 2210 will not send email. I sometimes get the message that the network connectin is incorrect other times I get no error and the messages just sit in the outbox and go no where. There is a thread on BrightHand discussing this. http://discussion.brighthand.com/showthread.php?s=4ec1ccfbdb501ce296d48516ede4829e&threadid=83065

I have tried all the fixes listed in this thread with no luck. I am trying to connect to a company email server that I think is an outlook server. It supports thousands of outlook users. It also has an SMPT outgoing server. I have no problem with PPC 2003 sending email thoough a unix server on a different account.

Anyone got any new ideas?
Thanks

[Ollie03031]

Some additional information.
The email server is a windows NT 4.0 system running Exchange 5.0. It works with email on the Pocket PC 2002 system but I can't send email using a Pocket PC 2003 system. Settings are exactly the same, email just sits in the outbox.

[Ollie03031]

New data, it is Exchange 5.5 service pack 3. Stiil does not send email with my Pocket PC 2003.