Spey is an SMTP proxy that sits between your existing mail server and the outside world, blocking spam using a greylisting technique. It is simple, lightweight, easy to install and configure, requires minimal changes to your existing mail server, is completely independent of which mail server you're using, and extremely effective.

Spey is the easy way to reduce the amount of spam you receive. It sits between your mail server and the outside world and performs greylisting and other verification checks. It needs very little configuration and no mail server setup and Just Works.

A desexed (speyed) female cat or kitten

a particular casting technique using special two-handed rods and a modified roll cast. It is named after a river in Scotland where it was developed.