[Greylist-users] greylist lib in C? + several Q's

William Blunn bill--greylist at blunn.org
Wed Sep 1 04:57:34 PDT 2004

> And turning on greylisting in a learning mode (recording triplets but
> not tempfailing any mail) or as an experimental service (with all
> recipients whitelisted except a few who knowingly accept the risk of
> delayed or lost mail) would probably cause a slight net increase in
> resource usage, when our mail servers are already overloaded.

Looks like a saw-sharpening situation to me.

I can't be wasting time sharpening my saw because I'm too busy
trying to cut down trees with my blunt saw.

If greylisting is turned on, chances are the servers will start
rejecting 50+% of delivery attempts at *RCPT* time, i.e. before any
of the message data is sent to them.

It will tend to save 50% of incoming network bandwidth.

Also the Internet-facing mail servers will have 50% less incoming mail
to deal with.

Also the servers which deliver mail to the users will have 50% less mail
to deal with.

So this will contribute towards vastly lowering your server load.

So chances are it will not only solve your spam problem, it will also
solve your server overload problem.

Of course the problem you have now is inertia, conservatism and


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