Hi Per

> Is there any point in greylisting genuine mailservers?  We only
> greylist dodgy-looking setups. 

True, no point in greylisting a propper SMTP engine that does queueing
and would resend the email later in case of a 4XX error.

But how do you find out which ip's to greylist and which not to?

We use milter-greylist and this has nice features like being able to do
DNS whitelist lookups and query SPF records to decide whether to
greylist a specific trippled or not. And it can sync it's database
across multiple servers.

-BenoƮt Panizzon-
I m p r o W a r e   A G    -    Leiter Commerce Kunden

Zurlindenstrasse 29             Tel  +41 61 826 93 00
CH-4133 Pratteln                Fax  +41 61 826 93 01
Schweiz                         Web  http://www.imp.ch

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