Re: [IMail Forum] Invalid address bounces...

Mon, 17 Jul 2006 05:33:21 -0700

To clarify what the context of the statement.  This was about Exchange.  There is a "catch-all" script for Exchange which I guess is similar to our nobody alias, but on a server wide scale.
 
He says that a mail server should never reject a connection as invalid.  If I sent a message to an invalid address the server should never let anyone know if the address is valid or not.  Apparently Exchange can tar pit on dictionary attacks even with this catch-all script in place.  I know little or nothing about Exchange.
 
So in the context of the discussion Imail does reveal non-existant email addresses which he claims should never be done.
 
Sorry if I wasn't clear.
 
-Joe
----- Original Message -----
Sent: Monday, July 17, 2006 1:50 AM
Subject: RE: [IMail Forum] Invalid address bounces...

What you are telling us is that you have something in Imail configured to receive e-mail for non-existent addresses. Please correct that configuration and the problem will be gone.

 

John T

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"Seek, and ye shall find!"

 

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joe Wolf / Internet Specialists, LLC
Sent: Sunday, July 16, 2006 1:34 PM
To: [email protected]
Subject: [IMail Forum] Invalid address bounces...

 

I admit I don't keep up with the RFC's, but I know there are some here that do.  A statement came up in another forum I follow that has me wondering about the RFC's.

 

We don't bounce SPAM or virus messages because it's been generally accepted that it's a bad practice to do so.  If we receive a message to an invalid email address Imail automatically sends a bounce message. 

 

Here's the statement that was posted on the other forum: "and it is poor practice today to send NDRs for invalid email addresses"

 

Are bounce messages for invalid address required by an RFC? 

 

Opinions on not sending NDR's for any reason?

 

Thanks,

Joe

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