Veeam Backup - Backup and restore VMware and Hyper-V virtual machines with Veeam Backup Free Edition. Unlimited hosts and VMs. Free forever.
SpamHero - SpamHero is a professional spam filtering accuracy while lowering the cost to domain and business owners.
Rubrik - Rubrik delivers instant application availability for recovery, search, cloud, and development.
SpamAssassin - Use this program to "Unspam" your mailbox(es).
Zerto - Virtual replication & recovery solution
SpamTitan - Comprehensive Email Protection. 99.99% Spam Detection. Blocks phishing, viruses, malware and other email threats.