--On 10 January 2006 17:11:16 +0100 Jakob Hirsch <[EMAIL PROTECTED]> wrote:
Ian Eiloart wrote:
Does Exim have a random number generator?
Recent versions have the modulo operator, so you can build yourself a poor
man's RNG:
${if eq{${eval:($tod_epoch+$pid)%2}}{0}}
will give you true with a 50% (= 0.5 = reciprocal value of 2) chance (over
a sufficent long period). That's much less expensive than a regex, I'd
say.
Note that messages received within the same second over the same
connection will have the same value assigned, but that's typically not a
problem with spam.
No, that's OK. And, actually characterising everything received over the
same connection has some value. For example, I'd like to know whether a
spam bot was planning on delivering hundreds of messages. If so, then my
spam rejection ratio could go way up. I guess I'd have to accept the
messages to find that out.
--
Ian Eiloart
Servers Team
Sussex University ITS
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