Cost / License
- Free
- Proprietary
Platforms
- Windows


Origami SMTP was created with the idea to have a fake email server for testing purposes that supported TLS. This is because the code the developer was working on at the time had several hard coded values enforcing TLS so most other solutions would not work.


Paubox provides HIPAA compliant email encryption without the hassle of extra steps. Just send emails like normal from any device.
TLS Checker is a Free TLS / SSL Expiry Monitoring Service which includes Discovery, Inventory and Management of certificates. For Free.



NikaMail is a portable, extendable, zero-config email server. It is designed to perform automation tasks, provide access to mailboxes (port 110), serve as a mail transfer agent (port 587) and mail exchange service (port 25). NikaMail supports TLS.




Mox is a modern full-featured open source secure mail server for low-maintenance self-hosted email.




Zorp GPL is a next generation, open source proxy firewall with deep protocol analysis. It allows you to inspect, control, and modify traffic on the application layer of the ISO/OSI model. Decisions can be made based on data extracted from the application-level traffic (for...