Thanks,
We succeeded to solve this problem in this way, I create in main.cf
smtpd_client_restrictions =
check_sender_access hash:/etc/postfix/check_bounce_sender,
cat /etc/postfix/check_bounce_sender
<> check_no-bounce_domains
And:
smtpd_restriction_classes = bloqueio-reverso, check_no-bounce_domains
bloqueio-reverso =
reject_unknown_client
check_no-bounce_domains =
check_client_access hash:/etc/postfix/nobounce_domains
cat /etc/postfix/nobounce_domains
google.com DISCARD Bounce_Attack
Mar 12 16:18:51 servername postfix/smtpdmx[28290]: NOQUEUE: discard: RCPT
from mail-ew0-f163.google.com[209.85.219.163]:
<mail-ew0-f163.google.com[209.85.219.163]>:
Client host Bounce_Attack; from=<> to=<lo...@mydomain> proto=ESMTP helo=<
mail-ew0-f163.google.com>
If i have problems with another ISP what i have to do is add a domain in
/etc/postfix/nobounce_domains .
Thanks,
Alexandre Carlim
2009/3/12 Alexandre Carlim <[email protected]>
> Hi,
>
> What i have to do for discard email when reverse name is google.com and
> from is <> , Currently i''m receive 1.200 millions for email per seconds, a
> bounce atack.
>
> Thanks
> Alexandre Carlim
>
