<div>
hi,<br />
<br />
Did you see any error ?<br />
<br />
Could you try &nbsp;send message with telnet between exchange server's<br />
<br />
<a href="https://social.technet.microsoft.com/Forums/exchange/en-US/a2253bdb-b266-45f4-b0ad-5832b7eb1328/establish-mail-flow-from-exchange-2007-to-exchange-2013?forum=exchangesvrdeploy" rel="ugc nofollow">https://social.technet.microsoft.com/Forums/exchange/en-US/a2253bdb-b266-45f4-b0ad-5832b7eb1328/establish-mail-flow-from-exchange-2007-to-exchange-2013?forum=exchangesvrdeploy</a><br />
<br />
<a href="http://msexchangeguru.com/2013/08/03/e2013-2010mailflowissue/" rel="ugc">http://msexchangeguru.com/2013/08/03/e2013-2010mailflowissue/</a>
</div>


hi,

Did you see any error ?

Could you try  send message with telnet between exchange server's

https://social.technet.microsoft.com/Forums/exchange/en-US/a2253bdb-b266-45f4-b0ad-5832b7eb1328/establish-mail-flow-from-exchange-2007-to-exchange-2013?forum=exchangesvrdeploy [https://social.technet.microsoft.com/Forums/exchange/en-US/a2253bdb-b266-45f4-b0ad-5832b7eb1328/establish-mail-flow-from-exchange-2007-to-exchange-2013?forum=exchangesvrdeploy]

http://msexchangeguru.com/2013/08/03/e2013-2010mailflowissue/ [http://msexchangeguru.com/2013/08/03/e2013-2010mailflowissue/]

<div>
You need to create a relay between the 2 servers. A similar post can be found below;<br />
<br />
<a href="https://www.experts-exchange.com/questions/28198220/Exchange-2013-Internal-Emails.html" rel="ugc">https://www.experts-exchange.com/questions/28198220/Exchange-2013-Internal-Emails.html</a>
</div>


You need to create a relay between the 2 servers. A similar post can be found below;

https://www.experts-exchange.com/questions/28198220/Exchange-2013-Internal-Emails.html [https://www.experts-exchange.com/questions/28198220/Exchange-2013-Internal-Emails.html]

<div>
Thanks David,<br />
That worked perfectly. &nbsp;Thanks to everyone else who commented on this. &nbsp;<br />
<br />
Pete
</div>


Thanks David,
That worked perfectly.  Thanks to everyone else who commented on this.  

Pete

<div>
I'm glad &nbsp;I could help.<br />
<br />
Thank you for the points.<br />
<br />
Regards<br />
<br />
D.
</div>


I'm glad  I could help.

Thank you for the points.

Regards

D.

<div>
<div class="content wysiwyg-content">
Since I've introduced a 2013 exchange server and moved some mailboxes over to it from exchange 2007, I cannot email between the 2 mailservers internally. &nbsp;Both server can email outbound to the internet. &nbsp;Is there anything that needs to be looked at? &nbsp;Thanks.
</div>
</div>


Since I've introduced a 2013 exchange server and moved some mailboxes over to it from exchange 2007, I cannot email between the 2 mailservers internally.  Both server can email outbound to the internet.  Is there anything that needs to be looked at?  Thanks.

Internal email between Exchange 2007 and Exchange 2013

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

Microsoft Server OS

An email client, email reader or more formally mail user agent (MUA) is a computer program used to access and manage a user's email. A web application that provides message management, composition, and reception functions is sometimes also considered an email client, but more commonly referred to as webmail.

Internet / Email Software

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.