Milter-greylist

Ryan Moore a \ufffdcrit :
> 
> I use the following (on one line):
> 
> acl whitelist domain /[0-9]{1,3}\-[0-9]{1,3}\-[0-9]{1,3}\-[0-9]{1,3}.*\.static/
> 

That's exactly the kind of client I would rather blacklist or "heavy" 
greylist. More than 90% of spam comes from infected customer ADSL 
clients, the ones which have such generic rDNS entries (either static or 
dynamic).

If someone wants to operate his own mail server on a private ADSL line, 
he must prove its legitimity by some reputation mechanisms:

- publish an SPF record for his domain
- get his server IP listed in list.dnswl.org whitelist
- get his server IP unlisted from pbl.spamhaus.org
- be sure to have his server RFC-compliant, for example by reliably 
retrying after 4.x tempfail until 5 days
- professionnally maintain his server, keeping it out of intrusions and 
spam relaying

All these mechanisms may be used in milter-greylist 4.0+ and help 
building an reputation for inbound clients.

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