Dave Smith wrote:
Most of the spam that gets through my spamassasin setup is not
English. It seems to be Russian or Arabic. Does anyone have a cool
procmail rule that will filter out Russian or Arabic emails?
It seems that the subject lines of many (all?) Cyrillic emails look
something like this:
Subject: =?KOI8-R?Q?=CF=D4=DE=C5=D4=D9_=F2=F6=E4?=
Which gets rendered like this:
отчеты РЖД
Here's another example:
Subject: =?koi8-r?B?7e/06ffh4+nxIPTy9eTh?=
Which appears thusly:
МОТИВАЦИЯ ТРУДА
The "KOI8-R" you see in the above Subject line refers to a Cyrillic
encoding and indicates to the mail client that the rest of the text is
thusly encoded. Wikipedia has a nice article on KOI8-R:
http://en.wikipedia.org/wiki/KOI8-R
To filter out these messages, I added a super simple procmail rule:
:0:
* Subject:.*koi8-r
$HOME/Maildir/.crap/
I haven't done extensive testing, but will let this run for the coming
weeks and report.
--Dave
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