[Gllug] Rejecting mail at backup MX

Bruce Richardson itsbruce at uklinux.net
Wed Feb 11 16:03:58 UTC 2004

On Wed, Feb 11, 2004 at 03:58:10PM +0000, Xander wrote:
> I have seen people complain about admins using callout.  I use it myself
> and it cuts out thousands of spam that Spamassassin and RBLs miss or are
> unsure about.
> (For those that have not used it: Exim tries to reject the email and
> sends a test reject to the sender. 

Well, that's how it does sender callout and it's not trying to reject
it, it's just does this:

	helo exim.box
	mail from: <>
	rcpt to: sender at alleged.source

I don't use sender callout at all, I just use recipient callout, where
the mailer connects to the destination system and does this:

	helo exim.box
	mail from: alleged.sender at alleged.source
	rcpt to: recipient at domain.org

and rejects the mail if the end system rejects it.


Hummingbirds are the only birds that can fly backwards, apart from
ostriches if you punch them hard enough.
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