Software
skarnet.org
 smtpd-starttls-proxy 
 What is it ? 
  smtpd-starttls-proxy is a package implementing STARTTLS for
inetd-like mail servers that do not already support it.
 Installation 
 Requirements 
 -  A POSIX-compliant system with a standard C development environment 
-  GNU make, version 3.81 or later 
-  skalibs version
2.14.4.0 or later. It's a build-time requirement. It's also a run-time
requirement if you link against the shared version of the skalibs
library. 
-  s6 version
2.13.2.0 or later. It's a build-time and run-time requirement. 
-  Recommended at run-time: s6-networking version
2.7.1.0 or later. It's not a requirement, but you won't be able
to do much with smtpd-starttls-proxy if you don't have a suitable
UCSPI-TLS server tool, and s6-networking
provides a simple one. 
 Licensing 
 smtpd-starttls-proxy is free software. It is available under the
ISC license.
 Download 
 Compilation 
 -  See the enclosed INSTALL file for installation details. 
 Upgrade notes 
 -  This page lists the differences to be aware of between
the previous versions of smtpd-starttls-proxy and the current one. 
 Reference 
 Commands 
 Related resources 
 -  smtpd-starttls-proxy is discussed on the
skaware mailing-list.