[Mimedefang] reject a message if listed on more than one DNSBL

[Marcus Schopen]

Hi,

is it possible to reject a message if it's sending server is listed in
more than one given DNS-blacklists before the message is running into
further resource hungry spamassassin content filtering? I'd like to
reject messages from a server if its IP is found in at least _two_ of
four given DNSBLs. If there is no hit in these given DNSBL lists or only
in one of four lists, in a next step the message should be scanned by
Spamassassin.

Cheers
Marcus