Tonino Greco <[EMAIL PROTECTED]> wrote:
>
> I would like to know how to get spam filters set up?
RBL blocks mail from domains which either 1) have been reported for
relaying spam, or 2) are willing to relay _any_ mail, which of course
includes spam. Using RBL blocks some spam, and some legitimate mail. The
point is to put social pressure on bad Internet citizens.
> I have installed rblsmtp and it is running - but it does not seem to
> be blocking??
How do you know? Do you mean that mail from a blacklisted domain is
getting through? Or do you mean that you are still receiving spam?
Understand: you will not prevent all spam from reaching you. Spammers
try to make their mail look exactly like "good" email: _you_ can tell
the difference, but often your _computer_ can't.
Ad hoc filters, can trap some spam. Stricter filters, more spam. BUT
strict filters will throw away legitimate email. Some examples:
1. Messages whose headers violate RFC 822 (can discard good mail)
2. Blind carbon copies (_will_ discard mailing list postings)
3. Messages with all-caps subjects (might discard good mail)
4. Messages with exclamation marks in subjects ("You're an uncle!!!!!")
5. Messages with "unsubscription information" inside (probably OK)
6. Mail with "money" or "$" in the subject ("We got the deal! Big money!")
7. Mail from anyone not on your "approved" list
8. Mail which doesn't contain the day's password in the subject
9. Mail containing any word in a dictionary of bad words
...
Only you can decide whether to shoot in self-defense; it's only your
problem if in so doing you shoot your daughter.
Len.
--
You seem to think that spam is a pattern-recognition problem. It isn't.
You're ignoring the anti-fax effect: anti-spam rules become useless when
enough people start using them. Spammers adapt.
-- Dan Bernstein
