On Feb 19, 2009, at 10:39 AM, Noel Jones wrote:
jeff donovan wrote:
Greetings
I have a user whos name is being spoofed by the spammers of the
world. and her mailbox is getting flooded by legitimate Mailer
Delivery notices.
Is there anything i can do for her besides change her account
name ? I was thinking about a temporary regex to discard those
notices. ( i know not the best but it may stem the tide ).
any assistance is welcome
-jeff
General suggestions for combating backscatter:
http://www.postfix.org/BACKSCATTER_README.html
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
In this case you may also want to *temporarily* reject all NDNs
addressed to that particular user. General instructions:
http://www.postfix.org/RESTRICTION_CLASS_README.html
more specific:
# main.cf
smtpd_restriction_classes =
reject_ndn
reject_ndn =
check_sender_access hash:/etc/postfix/reject_ndn
smtpd_sender_restrictions =
check_recipient_access hash:/etc/postfix/backscatter_recipient
# backscatter_recipient
vic...@example.com reject_ndn
# reject_ndn
<> REJECT please don't send notices to forged sender
-- Noel Jones
Greetings,
I have added the data restrictions, the restrictions class, and the
sender restrictions. is there an error number or something I can grep
in my logs to check how these new restrictions are functioning? or if
they are even having an effect?
