Free Secure Email Gateway Software & Tools

NoSpamProxy ensures protection against spam and ransomware, offers secure email encryption and safe large file transmission. Works in the cloud or as a managed service.

Paubox provides email security products for encrypted, HIPAA-compliant communication. It offers protection against spam, phishing, and malware.

Cloudflare Area 1 is a cloud-based email security solution offering Zero Trust protection against phishing, malware, and credential theft.