Spamihilator - The free Anti-Spam-Filter Spamihilator removes more than 98% of spam mails before they even get into your inbox.
Windows 10 Firewall Control - Windows 10 Firewall Control: simple and exhaustive solution for applications network activity controlling and monitoring.
SpamAssassin - Use this program to "Unspam" your mailbox(es).
TinyWall - Lightweight and non-intrusive firewall
Spam Reader - Spam Reader is a free anti-spam add-on for Microsoft Outlook.
Emsisoft Online Armor Firewall - Emsisoft Online Armor Firewall is a freemium online firewall protection system by the Emsisoft that is based on the own independent protection technology of the Emsisoft.