Re: Mail not delivered

[email protected] wrote:
> We are having problems with a couple of our partners receiving the 
> following message when sending email to our address.  How do we find out 
> what's causing this delivery failure?
> 
> From: Mail Delivery System [mailto:[email protected]] 
> Subject: Delivery Status Notification (Failure)
> 
> The following message to was undeliverable.
> The reason for the problem:
> 5.4.7 - Delivery expired (message too old) ''

For that you will have to contact the owner of the mail server that 
generated that failuer message for a more specific interpretation of it.

The mail server is claiming to be ironport.qrs.com and if you have 
reason to trust that it is telling the truth, that would be who to contact.

A mail server will try for a period of time to find a destination server 
that will either accept or permanently refuse a message.  One other 
option is to request the sending server to try again later.

This error message indicates that the mail server ironport.qrs.com is a 
mail server that you are using for outgoing e-mail.

And because it does not indicate that it ever got any status from a 
destination mail server, this indicates that it never found one to 
deliver it to.

This could be from multiple causes:

1. The error message is incorrect.

2. Your outgoing mail server does can not resolve or find a route to the 
destination.

3. Something on the internet between your server and the destination 
server is blocking the packets.  This could either be deliberate or 
accidental.

4. The recipiant is refusing packets from your server.

It would greatly help if ironport.qrs.com gave a better diagnostic of 
why it could not deliver the e-mail before it expired.

This may or may not be a clue:

http://www.moensted.dk/spam/?addr=ironport.qrs.com&Submit=Submit

See the text:

"no IP found for ironport.qrs.com - try again"

The name ironport.qrs.com is not visible to the public internet.

-John
[email protected]
Personal Opinion Only