[Mimedefang] Browser Bug: Very bad in IE and varies on Netscape and Mozilla

[David F. Skoll]

On Sat, 20 Dec 2003, Jonas Eckerman wrote:

> uri KAM_URIPARSE       /[a-z]+\:\/\/\%0[01].*\@/

Using a regular expression like that in SpamAssassin is Very Bad News.
SA treats the entire message as one humongous line, and an unlimited
quantifier (as in ".*" or "[a-z]+") will be really, really slow.

Writing SA rules is incredibly tricky.  You can limit it to something
reasonable by using {0,50} everywhere you'd normally be tempted to use *,
and {1,50} where you'd normally be tempted to use +

--
David.