ZixGateway allows you to set up Transport Layer Security (TLS) for your incoming and outgoing email traffic.
With support for Transport Layer Security (TLS), ZixGateway users can secure both internal and external traffic, facilitating interoperability with other vendors. With TLS support, ZixGateway can send email securely to another MTA across the internet.
The ZixGateway TLS implementation has been tested for compatibility with popular TLS-capable MTAs including Postfix/TLS and Sendmail.