can recieve mail but can only send some via smtp.

[mviltan]

I'm in the UK and have a BT Broadband conecction which is ADSL. Instead of using the BT Modem that came with it I'm using a Belkin F5D7630-4A ADSL wireless router. I have an email account with pipex. When I first got ADSL I found out that BT do not let you send via pipex for some reason. I had to change my smtp settings in outlook to use mail.btopenworld.com but my incoming address stays as pop.dial.pipex.com. I also have to pay £2 for the service!! That worked fine on the BT modem. Now i'm using the belkin it recieves mail fine but it sends to some addresses and not others! I rang belkin they told me to change the routers host name to mail.btopwenworld.com. I managed to send an email to an address @incepta-mi.com but cannot send to @springboardplc.com. I know the address works fine as i have received mail from them. What is the diffrence with the addresses?!

I'm stuck in a loop where bt tell me to ring belkin and vice versa!!!

I'll be greatful for any help!

Cheers

Mark