Geert Hendrickx wrote:
On Thu, Feb 19, 2009 at 09:39:42AM -0600, Noel Jones wrote:
You can use the ips.backscatterer.org to reject bounces (*NOT* all mail)
from known backscatter sources. Do this in smtpd_data_restrictions for
compatibility with sender address verification.
# main.cf
smtpd_data_restrictions =
check_sender_access hash:/etc/postfix/backscatterer
# backscatterer
<> reject_rbl_client ips.backscatterer.org
Just wondering; why do you apply this in smtpd_data_restrictions and not in
smtpd_sender_restrictions?
Geert
Some sender verification tools use the null sender address.
Some sites doing such verification are listed as backscatter
sources - and may be the reason they are listed.
At any rate, you must allow their probes if you want to
communicate with them. Delaying the rbl check until the DATA
stage allows address probes, but blocks real mail.
-- Noel Jones
