Ian LeBlanc <[EMAIL PROTECTED]> wrote:
> > > Is there any patches or any way to stop email being generated on
> > > my server
> > > and sent from a NULL from address...
> >
> >Go read RFC2821 to find out why this is a no-no.
> Ok is there any patches that allow me to specify FULL from addresses that
> the server when it recieves them trashes the email.
`man qmail-smtpd`, look for "badmailfrom". Note that the addresses
referred to are the envelope sender address, not the contents of any
From: header (the two are unrelated).
> Example..
>
> 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..
Anybody can specify any envelope sender address. There's other trivial
ways to forge this information, so there's no point trying to prevent
it.
> 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.
You're getting double-bounces, you mean? As in, undeliverable bounce
messages? Who says the mail is originating from your server? It could
be a joe-job.
If your server _is_ the source of the spam, this should be very easy to
detect with the standard qmail tools -- qmail-qstat, qmail-qread, and
the qmail-send logs. Those logs will also tell you how the message got
into your system.
> 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.
Changing MTAs will not help you; this is a question of compentent server
administration, not choice of MTA.
Charles
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Charles Cazabon <[EMAIL PROTECTED]>
GPL'ed software available at: http://www.qcc.sk.ca/~charlesc/software/
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