On Tue, 2004-06-01 at 09:41 +0200, Jan-Peter Koopmann wrote:
> On Sunday, May 30, 2004 5:09 PM David Woodhouse wrote:
>
> > There are better ways of avoiding bounces to mail you didn't send.
>
> Enlighten us please...
See
http://www.infradead.org/rpr.html
∃ a better writeup than mine but I've only been referred to it in
private so I won't post its location here. This is what happens in
practice -- first we prevent a attempted joe-job to a machine which does
sender verification callouts...
220 exim-colo-01.whoc.theplanet.co.uk ESMTP Exim 4.34 Tue, 01 Jun 2004 10:19:03 +0100
helo me
250 exim-colo-01.whoc.theplanet.co.uk Hello imladris.demon.co.uk [193.237.130.41]
mail from:<dwmw2@???>
250 OK
rcpt to:<exim-users@???>
550-Verification failed for <dwmw2@???>
550-Called: 213.146.154.40
550-Sent: RCPT TO:<dwmw2@???>
550-Response: 550-This address never sends messages directly, and should not accept bounces.
550-550-Please see http://www.infradead.org/rpr.html or contact
550-550 postmaster@??? for further information.
550 Sender verify failed
quit
... and then we reject a bounce from a machine which hasn't bothered to
do sender verification, but which has subsequently decided to reject the
message...
220-pentafluge.infradead.org ESMTP Exim 4.33 Tue, 01 Jun 2004 10:16:57 +0100
220 Be gentle with me
helo me
250 pentafluge.infradead.org Hello me [2002:c1ed:8229:12:20d:93ff:fe05:4a3e]
mail from:<>
250 OK
rcpt to:<dwmw2@???>
550-This address never sends messages directly, and should not accept bounces.
550-Please see
http://www.infradead.org/rpr.html or contact
550 postmaster@??? for further information.
quit
--
dwmw2
