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I confirm that on revisiting, RCVD_IN_* rules are implemented - thanks for your help
From: Karsten BrÃ¤ckelmann [mailto:firstname.lastname@example.org]
Sent: Wednesday, 13 October 2010 11:41 a.m.
Subject: Re: Constant .info domain spam
On Wed, 2010-10-13 at 11:16 +1300, Peter Lowish wrote:
> How are RCVD_IN_* rules implemented Karsten?
They are generally DNS BL checks, some of which do (and are safe for)
deep header parsing. Most of them are checked against the handing-over
relay's IP only, though.