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postfix-users: Re: Fighting Backscatter

Re: Fighting Backscatter

From: Stan Hoeppner <stan_at_nospam>
Date: Thu Oct 21 2010 - 07:41:59 GMT
To: postfix-users@postfix.org

Brian Evans - Postfix List put forth on 10/20/2010 12:57 PM:

> In your opinion, would check_reverse_client_hostname_access (Postfix
> 2.6+) work better here?
> Many dynamic zombies don't always resolve forward.

Operationally it probably won't make a difference as most ISPs who
bother to assign rdns also bother to create corresponding A records.
The reverse restriction available in 2.6+ is more technically correct
for this PCRE table application since the table is designed to match
rdns strings.

-- Stan