ANNOUNCE: mailwatch2rbl

[Gareth]

I have been chatting with Alistair Carmichael about a quick script he wrote
to extract a list of IP addresses out of the mailwatch database which have
only sent a number of spam emails and then automatically block them.

I have now created something which seems to be fully functional at least for
me. Alistair had a problem where php did not like the database library I am
using but I have never seen this before and have used it on various boxes
with a very large range of php versions.

You can read basically how it works and download the current release from
http://www.gbnetwork.co.uk/mailscanner/mailwatch2rbl/

The block table it generates is easy to use in Postfix and it can also
generate a file compatible with rbldnsd. I am not sure what exim and
sendmail can work with nativly but if someone would like to give me an
example I will enable it to generate compatible files for them aswell.