Re: [exim] Seeking advice how to deal with spam faked to app…

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Autor: Cliff Pratt
Data:  
Para: exim-users
Assunto: Re: [exim] Seeking advice how to deal with spam faked to appear as coming from my domain
On 11/14/05, Aaron Stromas <ams@???> wrote:
>
> Greetings,
>
> Some S.O.B. is sending spam faking the sender to be from my domain,
> izoard.com <http://izoard.com>, so the postmaster get all that mail
> bounced by spam filters
> (see below). Is there anything I can do about it?
>
> A related question, given the IP address od the sender, which does not
> the purported sender's DNS, I'd expect the filter to be a little smarter
> in bouncing spam, realising that the sender's email domain id faked. Or
> am I missing something?



No, there is nothing that you can really do about it. The messages are sent
by mail servers set up to bounce SPAM emails to the purported sender, which,
as you have seen, results in you getting bombarded with invalid SPAM
reports.

On the other question, there is nothing wrong with the message that your
mail system receives from the reporting mail system. The remote system is
sending a valid email from postmaster@??? to
Charlotte.Elmore@??? which is being delivered to your postmaster.
Both ends valid. No problems there.

The sending mail system *is* badly set up to send bounce messages to the
purported sender which is almost aways faked. I'd make the postmaster at
ns1.netwain.com <http://ns1.netwain.com> aware of the repercussions his
bounce policy, but you will almost certainly get ignored (unless the mail
admin has half a clue).

Cheers,

Cliff