Spam blocking tutorial

Spam blocking tutorial based on qpsmtpd & RBL lists

This is a link to an earlier Howto written for sme7.0 that is still applicable to sme7.x

There is good background information in the Howto regarding RBL lists, although some of the lists mentioned are now defunct. The link is posted here as a reference source for users of the sme server spam filtering panel.

I will revise the Howto & add it here when time permits.