http://bugzilla.spamassassin.org/show_bug.cgi?id=3417
------- Additional Comments From [EMAIL PROTECTED] 2004-05-27 12:16 -------
Subject: Re: New Rule: Checking sender IP against MX records From: [EMAIL
PROTECTED]
> NOW I dont undestand why you use some rules and reject other...
Whitelist rules cannot be easily defeated by spammers - yours is.
Whitelist rules need to have an S/O ratio below 0.1% - yours is not.
Whitelist rules need to hit at least 0.1% of ham - yours does.
1 out of 3 -> very bad
2 out of 3 -> not good
3 out of 3 -> likely we'll use unless it's very expensive, violates
a policy, or overlaps too much with another rule
Blacklist rules are harder to quantify since some ham hits are okay and
defeatability is not as big of an issue. Roughly speaking...
Blacklist rules should hit > 1% of spam
Blacklist rules should hit < 0.5% of ham
Blacklist rules should have an S/O ratio of 0.95 or better
Blacklist rules should not overlap other rules, especially better rules,
too much
Blacklist rules should not be too expensive to run or use.
Blacklist rules cannot violate a policy (unwritten or written) such as
intentionally discriminating against a particular country.
Daniel
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
