[LUAU] HDs for mirrors.hosef.org

[jonr at destar.net]

Quoting "HawaiiDakine.com" <webmaster at hawaiidakine.com>:


> Can anyone recommend a spam blocker, with a how to, that works? I was
> told that Spam Assissin is good, but I tried it and it does not kill off
> the spam and return it to sender. It does mark it as spam, but I could
> do the same manually.
>

Hi Al,

Spamassassin is a good way to help stem the tide of spam. You wouldn't want to
return it to the sender because it more than likely will not go to the spammer
but a compromised box of theirs. It will mark spam and rewrite the subject line
so you and your users can easily filter them to trash. You can also set a
threshold on the score that the spam receives and it it matches or exceeds this
threshold it is automatically sent to /dev/null.

A couple of other things to look into for spam fighting. A 30 second sleep
during the smtp exchange will reduce spam, sendmail uses what is called a
'GreetPause'. Testing for valid users during the smtp process then rejecting
the email if the user doesn't exist will also help. Make sure that you send a
message back to the sender letting them know that that user does not exist, it
may just have been a typo.

Anything you can do at the smtp layer is preferred, it will be less of a load on
your server at this level rather than spamassassin firing up perl to check the
mail.

Hope that helps a little,

Jon