Server 2008 an exchange 2010 send and receive delay

Server 2008 an exchange 2010 send and receive delay

Hello all, I have changed exchange server  from server 2003 and exchange 2003 to server 2008 with exchange 2010.
My new server is a virtual machine hosted by Microsoft hyper V.

I am suffering from some send and receive delay massages when I send to specific domain and if they try to send a mail to me they get an NDR

I tried to change my DNS server, checked blacklists, checked anti-virus and spam servers,

Ideas?
Robert-ProdigyAsked:
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Ahmed786Connect With a Mentor Commented:
Is your issue resolved ?
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Ahmed786Commented:
So when u try to send email to specific domain u get delay right ? and what about to other domains ?

Also if that domain to which mail is being delayed its always or sometime only.

And if they try to send u email back then they get NDR Right ?

So whats that NDR, can you paste that pls..

Is this behaviour started recently or from time when u migrated to Exchange 2010.

What if email from some other domain try to send mail to u, is that fine ?
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Robert-ProdigyAuthor Commented:
is it resolved?
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