Wed, 10 Oct 2001 15:20:06 -0700
There are a couple things to do that can at least cut down on spam.
1) Make sure that your mail gateway, or (in this case) the mailing
list host is not an open relay site. Check
for more information.
2) Every time you get spam, locate all the hosts it came through
in the header. Check both hostnames and ip addresses as one
of the common spammer techniques is to give a different hostname
than the ip address maps to. These are in the "Recieved-by:"
headers. Then send mail to everyone reasonable at the site you
get. If there are any mail addresses in the body of the
message, add them too - similarly with web addresses.
Given a site name of "foo.bar.com", my usual list of
addresses is :
I have a program to generate this list, as often I send mail
to several sites at a time.
In that mail, complain about the spam and include the entire
mail message that you got (including the headers). (If I
get really bugged - for example by getting the same spam over
and over again, I'll often include a huge image file that
contains the text "SPAM IS BAD" just for amusement. This
technique is for experienced drivers on closed courses only.
Don't try this at home.)
If your MUA supports changing your "Reply-To:" and "From:"
headers, change them to something nonsensical.
Ignore mail bounces.
Often the sysadmins will do their best to fix the problem,
however, many recent spams have originated in China and
they don't seem to be doing much to change that.
jeff putnam -- email@example.com -- http://cs.eou.edu/~jefu