Ansgar Wiechers skrev 2010-11-24 18:11:
On 2010-11-24 Patric Falinder wrote:
lst_ho...@kwsoft.de skrev 2010-11-24 11:08:
Be sure to limit the usage of the list to the affected account and maybe
even to bounce sender addresses as a lot of legitim hosts are listed.
See http://www.backscatterer.org/?target=usage
Ok, thanks! Is there any other ways to protect yourself against
backscatter?
I wrote a filter based on smtpprox [1]. Disclaimer: AFAIK this has never
been used on medium or high traffic servers, so I don't know how it
would perform in such environments.
[1] http://www.planetcobalt.net/sdb/backscatter.shtml
Regards
Ansgar Wiechers
Cool, I will check that out and see if I can try it out on my personal
mail-server first and see how it works.
I looked arround and found check_sender_access and
check_recipient_access, can I for example do something like this:
smtpd_recipient_restrictions =
...
check_recipient_access = /etc/postfix/check-for-backscatter
...
/etc/postfix/check-for-backscatter:
u...@domain.com reject_rbl_client ips.backscatterer.org
and then only the address u...@domain.com gets checked at
ips.backscatterer.org?
And if I would want to check all the mails that comes from <> can I do
the same only in the smtpd_sender_restrictions?
Thanks,
-Patric
