-- 
> From: Matthias Andree <madt.e-technik.uni-dortmund.de>
> Date: Tue, 12 Nov 2002 20:37:39 +0100
> To: postfix-userspostfix.org
> Subject: Re: (Wietse Venema )problems with spammers
> 
> postfix <postfixmicromark.com.cn> writes:
> 
>> would it be possible to add the following function to your excellent postfix
>> program.
>> 
>> when an email is sent from post fix it is given a "magic key", if an email
>> is returned an action can be performed based the key being from postfix or
>> not.
> 
> What's that good for? When the returned mail strips the magic key, what
> are you going to do? It could be legitimate or now -- you don't know,
> because the key is gone.
> 
>> the problem i have is spammers using my domain name & user list to send fake
>> emails out of their systems, so if a mailer they are sending to rejects the
>> email it comes back to my domain.
> 
> Contact the operators of those mailers and ask them to reject invalid
> mail rather than taking it in and bouncing it.
> 
>> some of my users are not so bright and are re-sending the emails out again,
>> if i can prevent the emails hitting the users this would be helpful, as
>> would  a return message back to the sending site saying that the email was
>> faked.
> 
> Educate them...
> 
>> a number of sites are trying to get me black listed purely because they see
>> our domain name on the emails.
> 
> Name those blacklists and show one of the bogus blacklist actions, so we
> know which blacklists not to use.
> 
> -- 
> Matthias Andree
yep like i have time to run about, sorting this sort of stuff out.
work it out, cost wise.

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