On Mon, Jun 10, 2002 at 09:39:07AM +0100, Philip Hazel wrote:
> On Fri, 7 Jun 2002, Dave C. wrote:
>
> > Basically a:
> >
> > "If the MX for the sending domain rejects MAIL FROM: <>, we wont accept
> > the mail at all"
> >
> > policy is a little bit too hard-line for our customers to accept (even
> > if it is the RFC-compliant way), but I could get away with a policy of:
> >
> > "If the MX for the sender domain rejects a RCPT TO: for the sending
> > address, regardless of wether the MAIL FROM: was <>, or
> > postmaster@ourdomain, we wont accept the mail"
> >
> > and still block lots of spam...
>
> I have added this idea added to the Wish List.
Note that I coded that back in the exim 3 days, and then realized how wrong
it was, because
1) people who refuse null envelope do _not_ deserve to have their mail
accepted
2) More importantly, you now connect to me as callbackuser@yoursite.
Great, I run he same option as you do, and guess what happens?
I trigger a callback to you with callbackuser2@mysite.
So what do you do? Well, you do a callback to me
Get the idea... ?
If you really have to accept mail from a broken site, just stick them in
your do not callback exclude list.
(after having suitably yelled at them, and pointed them to
http://marc.merlins.org/netrants/nullenvelope.txt
or equivalent)
Marc
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems & security ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/ | Finger marc_f@??? for PGP key
