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From: mouss (mlist.onlyfree.fr)
Date: Fri Jul 20 2007 - 06:09:33 CDT
> Ralf Hildebrandt wrote:
>> * Frederic <fredfred21.be>:
>>> I'm using postfix 2.3 on Opensuse 10.2.
>>> I receive many spams from servers without PTR
>>> eg: 220.127.116.11
>>> I added in main.cf smtpd_helo_restrictions = reject_unknown_helo_hostname
>> 18.104.22.168 is a CLIENT IP, not a HELO/EHLO
> How to reject mails from servers without PTR?
Warning. This may delay legitimate mail (dns timeout issues), and may
block mail from misconfigured sites.