On 9/19/2011 5:06 PM, john wrote:
> I am running Ubuntu 11.04 as a SOHO server with
> postfix/dovecot/Amavis-new/Spamassassin/Clamav setup as my email
> service.
>
> I currently use header and body checks in postfix as part of my
> anti-spam measures.
> How useful and/or how effective are these measures?
> Are they still worthwhile if I am using the
> Amavis-new/Spamassassin/Clamav setup for anti-spam?
The postfix feature of header/body checks is still very useful.
Write your own rules to block stuff that might not be blocked
otherwise.
For example, I've noticed frequent spam here with names in the To:
header (not in the envelope) that don't show up in legit mail, like
njon{and some numbers}@comcast.net. Spamassassin marks most of
these as spam, but header_checks can REJECT them.
Old header/body anti-spam rules found lying about the internet are
probably not useful. Other rules, such as attachment blocking by
extension, still work just fine.
Since you're asking, I'm guessing the rules you're using don't do
much good.
As a general guideline, if a header/body check rule rarely blocks
anything, you might as well remove it.
> The check files were originally from a third party (Jeff Posluns ?)
> and are fairly old, I have added some of my own checks but the basic
> files are originals. If these checks are still worthwhile are there
> more up to date files, and if so where might they be found?
I don't know of any up-to-date header/body checks repository. AFIK
the ones found on the internet are outdated enough to be ineffective
and just waste time.
-- Noel Jones
