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Do you use a smarthost?<br />
Do you use SPF?
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Yes we use Postini as a smarthost. I am not sure what SPF is?
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Yes we use Postini as a smarthost. I am not sure what SPF is?

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Hello, I have recently changed my public IP address for my exchange server. I am getting no outbound mail now. I keep getting the error in my queues that the remote server did not respond. &nbsp;<br />
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I have even setup another NAT policy to allow my old public ip and my new public ip to my exchange server.<br />
I can telnet to port 25 on both IP addresses<br />
I have inbound mail coming in without issues<br />
We use Postini and the postini tests all pass for reinjection hosts<br />
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I have tried even configuring the exchange server to bypass postini for outboudn and that doesnt work either...i called our ISP and had a reverse lookup record setup for the FQDN of the server since it wasn't resolving.... can anyone help I have tried everything i can think of and nothing is working.
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Hello, I have recently changed my public IP address for my exchange server. I am getting no outbound mail now. I keep getting the error in my queues that the remote server did not respond.  

I have even setup another NAT policy to allow my old public ip and my new public ip to my exchange server.
I can telnet to port 25 on both IP addresses
I have inbound mail coming in without issues
We use Postini and the postini tests all pass for reinjection hosts

I have tried even configuring the exchange server to bypass postini for outboudn and that doesnt work either...i called our ISP and had a reverse lookup record setup for the FQDN of the server since it wasn't resolving.... can anyone help I have tried everything i can think of and nothing is working.

Outbound Mail broken

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

Software is any set of instructions that directs a computer to perform specific tasks or operations. Computer software consists of programs, libraries and related non-executable data (such as documentation). Computer software is non-tangible, contrasted with computer hardware, which is the physical component of computers. Software written in a machine language is known as "machine code". However, in practice, software is usually written in high-level programming languages than machine language. High-level languages are translated into machine language using a compiler or interpreter or a combination of the two.