ResellerClub's FREE, Personal, Enterprise and Lite Email Hosting services managed directly from your WHMCS system. Fully featured Email Account and Mailinglist Management coherently integrated into WHMCS!
Irreplaceable is the one word I would use to describe Marco. He provides first-class support for the ResellerClub modules and works tirelessly to help if you have a technical problem. His vast knowledge is impressive and I highly recommend his software. Kudos to you Marco!