FractalBob wrote:
> Can SpamAssassin be configured to use the domain in the sender e-mail address
> or in the message content itself as an input parameter to, say, a WHOIS
> search, in order to locate either the sender or his ISP? I know this would
> be expensive, since it would require going out to the network, but it could
> be really useful. TIA!

- there is no usable whois interface for that. most whois sites will
blacklist you if you knock them too much.

- since spammers often forge the sender address, you don't really care
of the corresponding whois infos.