Reject bounce email

[anas asree]

Hi all

Thank you for the responses..but yesterday I used postfix access table format to block null sender..
and it seems that my mail server have not received undelivered mail message starting from yesterday..

----- Original Message ----
From: Drew Marshall <drew at technologytiger.net>
To: MailScanner discussion <mailscanner at lists.mailscanner.info>
Sent: Tuesday, January 9, 2007 6:28:11 PM
Subject: Re: Reject bounce email

On Tue, January 9, 2007 04:26, anas asree wrote:
> Hi all
> I've installed Postfix+Mailscanner+Mailwatch on SuSe 10.0
>
> My users have been receiving a lot of undelivered mail message from
> outside of our network. These emails have made our users complaint to us,
> although they did not send such email..
>
> How can I reject such emails from bouncing back to our users mailbox ?

Are you rejecting unknown senders in Postfix? Usually these bounce spams/
Jo Job attacks are targeted at random names and you can reject the
majority by using recipient maps of some kind.

If you can post an example set of headers there might be some other things
that can be done.

Drew

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