<div>
Please check if your Send Connector configured correctly: <br />
<a href="http://www.mustbegeek.com/configure-exchange-server-to-send-and-receive-outside-email/" rel="ugc">http://www.mustbegeek.com/configure-exchange-server-to-send-and-receive-outside-email/</a>
</div>


Please check if your Send Connector configured correctly:
http://www.mustbegeek.com/configure-exchange-server-to-send-and-receive-outside-email/ [http://www.mustbegeek.com/configure-exchange-server-to-send-and-receive-outside-email/]

<div>
Yes <br />
<br />
Its configured Properly
</div>


<div>
So check if Exteranl DNS resolution ok !
</div>


<div>
Hi,<br />
<br />
It just looks like your DNS record isn't published at all for treeadd.com. You should fix that and you're set.<br />
<br />
Cheers
</div>


Hi,

It just looks like your DNS record isn't published at all for treeadd.com. You should fix that and you're set.

Cheers

<div>
configuration requirements over Cisco firewall for NAT
</div>


configuration requirements over Cisco firewall for NAT

<div>
<div class="content wysiwyg-content">
Dear All,<br />
<br />
Strange thing happened to me, Some mails are bouncing back with different Ip Address <br />
For Exp<br />
<br />
I have a Domain Treeadd.com and its mail server FQDN should be mail.treeadd.com<br />
Treeadd.com have no ip address but Mail PTR record have 192.168.2.10<br />
<br />
ASA 5510 Is Configure for port forwarding and its having address 192.168.2.1<br />
<br />
<br />
When sending email, its should go with 192.168.2.10 address but its going with 192.168.2.1 and bouncing back <br />
<br />
Remote Server returned 'Server #5.0.0 smtp; 550 The email sent from 192.168.2.1 by usman@treeadd.com was rejected by the receiving server as the sending server did not pass the required reverse DNS lookup.<br />
<br />
<br />
Please Advice <br />
Thanks,
</div>
</div>


Dear All,

Strange thing happened to me, Some mails are bouncing back with different Ip Address 
For Exp

I have a Domain Treeadd.com and its mail server FQDN should be mail.treeadd.com
Treeadd.com have no ip address but Mail PTR record have 192.168.2.10

ASA 5510 Is Configure for port forwarding and its having address 192.168.2.1


When sending email, its should go with 192.168.2.10 address but its going with 192.168.2.1 and bouncing back 

Remote Server returned 'Server #5.0.0 smtp; 550 The email sent from 192.168.2.1 by usman@treeadd.com was rejected by the receiving server as the sending server did not pass the required reverse DNS lookup.


Please Advice 
Thanks,

Email Bouncing Back

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

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.