Your results contain 13 solutions with the following criteria :

Messaging, Email Marketing & Groupware
Solution Smile rating Users rating Popularity
SpamAssassin SpamAssassin 3.8 Smile No rating
26%   Popularity on the site
Zarafa Zarafa 3.8 Smile No rating
69%   Popularity on the site
Zimbra Zimbra 4.5 Smile 3.6 Visitors
100%   Popularity on the site