Mails not delivering to another site exchange

Hi,

i have 2 sites in my network HO and DC. I have exchange 2010 in my HO site and now deploying exchange 2013 in DC site. Installation got completed. Now I am trying to send a mail from exchange 2013 user to exchange 2010 user. When I check the queue these mails just stuck in the queue. What might be the issue? Any new intersite connector we need to create?

Regds
kolathaya123Asked:
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Simon Butler (Sembee)ConsultantCommented:
You don't need an MX record and you don't need any kind of connector.
When the messages are in the queues, what does it say as the error?
Are you able to telnet to port 25 of the other server and get a response? The usual reasons for this are restrictions on the connectors or something like a firewall or AV blocking the SMTP traffic.

Simon.
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Don ThomsonCommented:
Have you put both locations in your MX record - Give the largest Exchange server the Higher Priority and the smaller on a lower one.
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SandyCommented:
Agree with Siman,, as they are part of single domain they can send to each other without any connector or MX. Please try to check the inter-connectivity on specific ports

http://blogs.msdn.com/b/deva/archive/2008/02/21/list-of-ports-used-by-exchange-server.aspx

TY/SA
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kolathaya123Author Commented:
sorry to all. This was the issue in ASA firewall between the two sites.. The network engineers fixed and working fine now.

Thanks to all for your contributions..
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SandyCommented:
Good to see that

TY/SA
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kolathaya123Author Commented:
I've requested that this question be deleted for the following reason:

resolved
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SandyCommented:
So .. it was due to port blocking on ASA right ?
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