Re: [PLUG] Spam Elimination

[Fred K Ollinger <follinge@sas.upenn.edu>]

Does any exim wizard know this one? Is the below able to be done in exim?
I would like to do this as it sounds like it helps a lot. I would love to
use postfix, but for me it is just not an option for various reasons so I
would like to get this going in exim 3.

Thank-you very much.

Fred

> - Greylisting. The server sends a temporary delivery error on the first
> attempt from any machine-from-to triplet, and lets any that is resent after a
> few minutes through. As most of the spambots aren't running through real
> mailservers that retry mails, this blocks most of the spam but not anything
> coming from a legitmate server (with the exception of yahoo, which sends
> listmail out with unique bounce addresses every time, so they have to be
> whitelisted). This has reduced inbound spam significantly. (At least with
> postfix, it's in the auth phase, so it's not even checking headers, so much
> lower bandwidth usage).
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