Spamihilator - The free Anti-Spam-Filter Spamihilator removes more than 98% of spam mails before they even get into your inbox.
TinyWall - Lightweight and non-intrusive firewall
Mailwasher - Over 8 million people use MailWasher as their spam filter
Windows Firewall Control - Windows Firewall Control is not the built in firewall system in the Windows operating systems.
SpamAssassin - Use this program to "Unspam" your mailbox(es).
Windows 10 Firewall Control - Windows 10 Firewall Control: simple and exhaustive solution for applications network activity controlling and monitoring.