Spamihilator - The free Anti-Spam-Filter Spamihilator removes more than 98% of spam mails before they even get into your inbox.

FortiMail - Fortinet Email security is designed to block ransomware, phishing, and other cyber threats seeking entry via incoming email and outgoing messages don’t improperly leak sensitive data.

Mailwasher - Over 8 million people use MailWasher as their spam filter

Proofpoint Email Security and Protection - Learn about Proofpoint's email security solutions that protect organizations against threats such as email fraud, phishing, spam, bulk email, and viruses.

Spam Reader - Spam Reader is a free anti-spam add-on for Microsoft Outlook.

Barracuda Email Security Service - Secure Email Gateway