On this page I give some hints on how to filter spam. I am quite
conservative in this respect as I don't want to to loose any
mail which is not spam. That's why there are currently only a few hints.
Filtering Spam from Asia
As I get a lot of chinese and korean spam, I started to filter the following
header entries (procmail syntax):
- * ^Content-Type: .*ks_c_5601-1987
- * ^Content-Type: .*[gG][bB]2312
- * ^Subject: \=\?GB2312\?.*
- * ^Subject: \=\?big5\?.*
- * ^Content-Type: text/html; charset=euc-kr
- * ^Content-Type: text/html; charset="euc-kr"
- * ^Subject: \[[gG][bB]2312\].*
- * ^Subject: \[[Bb]ig5\].*
Filtering Spam Mailers
I do also filter for Spam-mailers that identify themselves with an
"X-Mailer" header entry. I have no guarantee that these tools are only
used for spams, by feel free to take a look at my list of tools from
which I already got some spam:
You can use the file for example with procmail to filter out some of
the spam, e.g. with the following rule:
This filters quite some chinese spam and I never had a false positive.
Last change: 22-May-2002