Re: blocking mail sent from <> (NULL Addresses)

[Dave Sill]

Ian LeBlanc <[EMAIL PROTECTED]> wrote:

>Someone is generating spam on my server and sending out from [EMAIL PROTECTED]
>the mail box [EMAIL PROTECTED] DOES NOT exist but the server sends it out 
>anyways..
>
>I am talking MILLIONS of emails... I can not track where they are 
>generating the mail
>from but it is now causing us a lot of trouble as ISPs are starting to 
>block our server
>and I in the meantime get hundred thousand bounce messages.

How can you not know which local user is responsible? Surely you've
looked at your logs...

>We are actually now considering changing MTAs because there seems to be no
>fix for what is going on and we see that as a problem.

I'd be suprised if there was a usable MTA that could prevent a local
user from sending spam.

-Dave