MX - DNS - SMTP questions


This is my first time setting up an exchange server from home so please bear with..

Basically I've brought a domain "" and had my registra (fasthosts) point it to my static IP provided by my ADSL provider (BTopenworld).   I've setup my DNS & MX stuff free on  

I setup my Exchange 2003 srv and used the wizard to guide me through my Mail SMTP connector...  Sending Email works fine, but I can't receive Email. :(
Opened up port 25 to my Exch srv on my router/firwall - I can Telnet to it from external.

I've check my config on  and it tells me that Some of my MX do not work properly -Answer from host 10, not found.   (my server name is not called "mail")  

Is there a problem with my MX record hosted on web-dns? is it a problem the SMTP connector on my exchange? is there a problem with my Domian DNS setup? Or is it something to do with BTopenworld ?   Please help..

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You need to add an A record for to point to the IP address of your router (  It's common for mx records to point to a address with the address pointing to your router.

Add that record into the ISP's DNS and it will work fine after that.

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