Title: Creating rules for the following

I have been trying to reduce the influx of spam to my company's mailserver but to no avail.
I looked at the mail headers of several spam messages and I am seeing the following.

Text => Rule
----    ----
1) Received: from [109.42.168.192] by 24.193.45.130 with HTTP => Received =~ /with HTTP/i
2) Subject: ?ISO-8859-1? => Subject =~ /(ISO-8859|iso-8859)/ (score = 3.0)
3) X-Authentication-Warning: iwdwgt vbwss kiyixtg  => exists:X-Authentication-Warning (score 2.75)

Are the above correct?
Will I bounce legit mail with it?


Gareth Segree
mailto:[EMAIL PROTECTED]
Technical Support Analyst
The Gleaner Company Ltd.
7 North Street
Kingston
Tel: 922-3400

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