dick hoogendijk wrote:
Some time ago I asked about filtering unwanted words. The advice was /
is not to do it, but I still want to try.
The filter rule was something like:
if($Subject =~ m// ) {
return action_bounce("bad subject");
}
Question: do I put the unwanted words into this rule like this:
if($Subject =~ m/sex|microsoft|Watch/ ) {
return action_bounce("bad subject");
}
I'm not sure how to put in the regex. How many words can I put between
those two slashes of m// ?
As many as you can fit. But I would be very careful about it. Plus, I
would make sure to use "\b" around the words, so that you're not getting
sub-string matches. For example:
\bsex\b will match "sex" but not match "Wesex".
So, maybe something like this:
if($Subject =~ m/\b(sex|microsoft|Watch)\b/ ) {
return action_bounce("bad subject");
}
However, as others have pointed out, it's not generally a good idea.
Spammers change their subjects often enough that you'll have trouble
keeping up. Plus, you'll be very prone to false-positives.
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