Regis,

I had several false positives today based on the BAD_X_HEADERS rule. I'm
using the rules from Chris' site (Nov02).  The legitimate emails had an
"X-URL" header.  All of the FPs where from a single mailing list.  For what
ever reason, they are providing a valid link to some content within this
header.

Anyway, after all of your hard work (that pays huge dividends for me), I
thought I would pass this along.

-- Scott

-----Original Message-----
From: Regis Wilson [mailto:[EMAIL PROTECTED]
Sent: Wednesday, October 22, 2003 1:14 PM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED];
[EMAIL PROTECTED]
Subject: RE: [SAtalk] [RD] simple rule for consumption


>Nope these are bogus. I have seperate rules for them in the last Rule
>Emporeum update. I used seperate, as they often are seen in pairs. Although
>I didn't tag X-Email, because I'm not sure about that one. 
>
X-Email: is pretty spammy for me, so it is in there.  I grepped my corpus
for
X-headers and significantly increased the rule.  Please let me know if I've
choses some false positives for others.  This rule is along the lines of
"create more rules that catch existing spam so that if other rules fail in
the
future, this one can catch it as backup".

At the very least, the spammers will see that these are dead giveaways and
STOP USING THEM.  Not that that's good for us...

Writing rules is fun!

header BAD_X_HEADERS            ALL =~
/X-(?:[Cc][Ii][Dd]|Camp...|ClientHost|cross|E|E[Mm]ail|Encoding-Version|ENVI
D|Find|[Ii][Dd]?|Indiv|INFO_.Z|JLH|L-C|Mailid|MailingID|Misc_ID|mailer|mlcip
her|mlmsgid|mpm|ms|ntc|PMG-.+|RMD-Text|Rec|SP-Track-ID|srk|TID|Trans|URL|Vig
|WCMailID|yd):/
describe BAD_X_HEADERS          Message uses spammy X- header
score BAD_X_HEADERS             3.0


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