Mailshell

Mailshell Anti-Spam Desktop is a desktop-based spam-filtering solution for Windows users that intercepts incoming email messages before they reach the user's inbox.

Mailshell's four spam-identification engines perform more than one million filter checks to identify spam with a high accuracy rate and a near-zero false-positive rate. Users can choose their filter strength and decide if they want spam put in its own folder, deleted, bounced, or simply marked so they will know to avoid it.

View the Mailshell donations programme eligibility criteria.