<div>
Will you provide some clarification?<br />
<br />
You can send from 2007 mailbox to 2010 mailbox ... yes or no?<br />
You can send from 2010 mailbox to 2007 mailbox ... yes or no?
</div>


<div>
You can send from 2007 mailbox to 2010 mailbox ... yes <br />
&nbsp;You can send from 2010 mailbox to 2007 mailbox ... no
</div>


Exchange-2007-Receive-Connector-7.png

Exchange-2007-Receive-Connector-2.png

Exchange-2007-Receive-Connector-6.png

Exchange-2007-Receive-Connector-9.png

Exchange-2007-Receive-Connector-5.png

Exchange-2007-Receive-Connector-3.png

Exchange-2007-Receive-Connector-8.png

Exchange-2007-Receive-Connector-4.png

Exchange-2007-Receive-Connector-1.png

<div>
I am getting delayed deliver responses now hours later - <br />
<br />
&nbsp;Toolbar &nbsp;Forward &nbsp;Move Delete &nbsp; Junk &nbsp;Close &nbsp; Previous Item Next Item Close &nbsp;<br />
&nbsp;<br />
Content Area Delivery delayed:RE: rer &nbsp;<br />
Microsoft Outlook &nbsp;<br />
&nbsp;<br />
Sent: &nbsp;Monday, September 26, 2016 4:30 PM &nbsp;<br />
To: &nbsp;user<br />
Attachments: &nbsp; <br />
&nbsp;<br />
&nbsp;<br />
&nbsp;<br />
Delivery is delayed to these recipients or groups:<br />
<br />
Administrator (Administrator@domain.com)<wbr /><br />
<br />
Subject: RE: rer<br />
<br />
This message hasn't been delivered yet. Delivery will continue to be attempted.<br />
<br />
The server will keep trying to deliver this message for the next 1 days, 19 hours and 53 minutes. You'll be notified if the message can't be delivered by that time.
</div>


<div>
Sweet! Glad it's working for you now.
</div>


<div>
<div class="content wysiwyg-content">
I have migrated a test mailbox over to the new exchange 2010 server-<br />
<br />
<br />
&nbsp;I am able to send and receive an email from test email account to test email account at same address<br />
<br />
&nbsp;I am able to receive en email from an internal domain user email account but cannot send to an internal domain user email account<br />
<br />
&nbsp;I am able to send to an external email address and can receive email from an external email address<br />
<br />
&nbsp;Any ideas why I cant send to an internal email address
</div>
</div>


I have migrated a test mailbox over to the new exchange 2010 server-


 I am able to send and receive an email from test email account to test email account at same address

 I am able to receive en email from an internal domain user email account but cannot send to an internal domain user email account

 I am able to send to an external email address and can receive email from an external email address

 Any ideas why I cant send to an internal email address

Mailflow issue when getting exchange 2007 and exchange 2010 to coexist

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

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.

Email Servers

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.