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Some gmail questions

Subject: Some gmail questions
From: blu-Z8efaSeK1ezqlBn2x/YWAg at public.gmane.org (Edward Ned Harvey)
Date: Sun, 9 Jan 2011 18:37:41 -0500
In-reply-to: <4D294F00.4060201-5a1Jt6qxUNc@public.gmane.org>
References: <4D273F27.5010406@blu.org> <000001cbaed9$5f1614d0$1d423e70$@nedharvey.com> <4D294F00.4060201@vl.com>

> From: discuss-bounces-mNDKBlG2WHs at public.gmane.org [mailto:discuss-bounces-mNDKBlG2WHs at public.gmane.org] On Behalf
> Of Tom Metro
> 
> To clarify, having a PTR record for your mail server's IP is generally
> required, but having the PTR record match the HELO (EHLO) domain should
> not be required, and rejecting messages that violate this is considered
> bad practice. Though that doesn't stop a few well known sites from doing
> so (craigslist.org, for example).

Agreed, but all spam filters are just assigning probabilities based on
things they see.  I don't know of anyone who rejects mail based on
unmatching forward & reverse & EHLO, but it is certainly possible for some
spam filter to allow that to be a factor.

References:
- Some gmail questions
  - From: gaf-mNDKBlG2WHs at public.gmane.org (Jerry Feldman)
- Some gmail questions
  - From: blu-Z8efaSeK1ezqlBn2x/YWAg at public.gmane.org (Edward Ned Harvey)
- Some gmail questions
  - From: tmetro-blu-5a1Jt6qxUNc at public.gmane.org (Tom Metro)

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