At Mon Jun 30 07:14:27 2003, ODHIAMBO Washington wrote:

> One of the rules for this version was against using a port other than
> the standard HTTP port. Well, since this is -CVS, I may as well keep
> quiet, but I wonder why this rule is here, since people are free to use
> other ports for HTTP.

The rule was introduced in 2.20, so it has been around for a while.

You're quite right that you can run HTTP on ports other than port 80,
but it's not particularly common.

The S/O ratio for this rule in 2.55 (in STATISTICS.txt) is 0.843, so
it's not a particularly wonderful rule and explains why it has a
maximum score of around 0.6.

So the answer is that the presence of a URL in a mail using a
non-standard port for HTTP is at least suggestive that the mail may be
spam, since it's much more likely to be seen in spam than non-spam.
But it's by no means conclusive which is why it has a low score.

The question is somewhat analogous to asking, "Why does a message in
HTML with odd fonts and lots of colours get a high score?  Surely
people are free to send HTML mails with odd fonts and lots of
colours?" - the answer is the same: such mails are statistically more
likely to be spam.

Martin
-- 
Martin Radford              |   "Only wimps use tape backup: _real_ 
[EMAIL PROTECTED] | men just upload their important stuff  -o)
Registered Linux user #9257 |  on ftp and let the rest of the world  /\\
- see http://counter.li.org |       mirror it ;)"  - Linus Torvalds _\_V


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