SpamAssassin - Use this program to "Unspam" your mailbox(es).
Malwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .
MailScanner - MailScanner is a open source email security system design for Linux-based email gateways.
Kaspersky AntiVirus - Download the best FREE antivirus for Windows-based desktops, laptops, & tablets and get the core protection against viruses, spyware, phishing & dangerous websites.
Rspamd - Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules...
Windows Defender - Windows 10 security delivers built-in & ongoing protections you can trust: Windows Defender Antivirus, firewall, family settings, ransomware protection, real-time protection & more. Stay up to date & protected at no extra cost.