Tracking messages stuck in queue

We've got a client where e-mail to 2 specific domains are simply not getting out of the queue -- shows Retry and then bounces back to the sender.

I'm quite new to Exchange Server - come form the sendmail world - and am extremely frustrated by the logs. There is nothing (that I can find anyway) to indicate what's going on between the sending and receiving servers.

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you can try to send email using telnet and see if that goes through.  Normally it is a dns issue on the receiving side.

try also and use their emailtest to see if there are any mx or dns erros on the receiving side  other than that from what i know there is no info that you will get from exchange as to the source of the error

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As maxis2cute already suggested try checking these domains using third party tools. If they are ok then I would try to do an nslookup for the mx records and telnet to port 25 from your SMTP gateway.

nslookup -type=mx

SMTP Telnet Test
SamcoSoftwareAuthor Commented:
The client was using an external e-mail service before employing an Exchange server. The 2 domains we could not e-mail to were still being hosted by this service. Unfortunately the client failed to cancel the service with the provider so their server still thought the Exchange servers domain was being handled by their server. When I telneted into the destination mail server I found that my EHLO came back with I cannot speak with myself!!! AAAAARRRRGHHHHH!!!
happy to be of assistance.  
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