exchange 2003 sp2 not sending to outside domains

we have 2 identical exchange 2003 servers.  1 server functions fine. the 2nd server will not send to outside domains.  the email sits in the queues and then ends with a ndr.  have double checked dns. have checked spf records, have checked ms records.  do not know what to check next.  i wish to press 2nd server into service once I get it to send to outside email  the ndr states: ndr status 4.4.7; message in queue expired. the sending server tried to relay or deliver the message but the action could not be completed before the message expired. the 1st server can send to the same domain, so I know it is working.  thanks for the help.
brianpcollinsAsked:
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Alan HardistyConnect With a Mentor Co-OwnerCommented:
Ah - that could be a problem!

Firewall issues / dodgy switch or LAN Cable issues perhaps or incorrect IP Configuration.
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Alan HardistyCo-OwnerCommented:
Is your router / firewall configured to allow the 2nd server to send out mail or has the IP Address been restricted from sending?

Please try a telnet command to my server from a command prompt:

telnet mail.mydomain.co.uk 25

and

telnet 188.220.xxx.xxx 25

Do you see my servername in the response or can you not connect with either telnet command?

Alan
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brianpcollinsAuthor Commented:
just found out that the server can not ping its default gateway.  looking into that right now.  not sure why yet. looks like it might be a hardware problem.  thanks
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brianpcollinsAuthor Commented:
Was a hidden nic, found m$ kb, am going to try it later this pm. Thanks for your input & time
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