Ed Leafe wrote:
> On Apr 2, 2008, at 2:36 PM, Paul M¢Nett wrote:
>
>> I had an email bounce because it had a single-word subject. Sheesh.
>
> I got a file containing lots of regex expressions for the Postfix
> header_checks file that contained things like:
>
> /^Subject: Re: .{2}$/ REJECT RULE: re dot 2
> /^Subject: .*Re:\s+$/ REJECT RULE: Re:\s+
>
> Apparently there were a flood of spam messages that followed these
> formats, and so these expressions were added to the file. Perhaps you
> ran into a similar problem.
Perhaps. The really stupid thing about rules like this is:
1) I get a message from someone with subject "Proposal"
2) I reply to it (subject "Re: Proposal")
3) That person's mail system bounces it.
IOW, I replied to their message with the subject they gave, but their
system rejected the reply!
I think that, other than checking for mail not following the RFC's and
maybe other blatant things, rules that reject based on a single
criterion are a bad idea. Tools like SpamAssassin that add scores for
each 'badness' found tend to work well without suffering from the
false-positive problem.
Paul
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