<div>
Hi,<br />
<br />
If that's the case, why does it work OK, with majority of the external domains?<br />
<br />
Thanks,<br />
<br />
Roger38
</div>


Hi,

If that's the case, why does it work OK, with majority of the external domains?

Thanks,

Roger38

<div>
Did you check the ip address by visiting the above site?<br />
<br />
It will work even if you dont have PTR created. for example your email will work well with gmail, yahoo.<br />
But some of the antispam system will consider your emails as spam without PTR
</div>


Did you check the ip address by visiting the above site?

It will work even if you dont have PTR created. for example your email will work well with gmail, yahoo.
But some of the antispam system will consider your emails as spam without PTR

<div>
<div class="content wysiwyg-content">
Hi,<br />
<br />
We are hosting Our Exchange 2007 server inside our firewall.<br />
<br />
Most emails to external domains are fine.<br />
<br />
But Some emails to external domains return with revers DNS incorrect error message.<br />
<br />
I checked with my ISP, Reverse DNS is setup correctly and points to the IP address of the email server.<br />
<br />
But the error message refers to the IP address of the outside interface of the firewall instead of the email server.<br />
<br />
Why so?<br />
<br />
And how to correct it.<br />
<br />
Thanks,<br />
<br />
Roger38
</div>
</div>


Hi,

We are hosting Our Exchange 2007 server inside our firewall.

Most emails to external domains are fine.

But Some emails to external domains return with revers DNS incorrect error message.

I checked with my ISP, Reverse DNS is setup correctly and points to the IP address of the email server.

But the error message refers to the IP address of the outside interface of the firewall instead of the email server.

Why so?

And how to correct it.

Thanks,

Roger38

Revese DNS setting is not correct.

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

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.

Windows Networking

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.