Sendmail

Sendmail 8.15

Free
Created for finding the right solution for open source users.
 
8.15.2 (See all)
The Sendmail Consortium

The Sendmail platform is specifically designed for large, complex environments, but developers made a subset of that solution available as an open source offering. Sendmail is not for everyone, but if you are using open source for a large complex environment and need an enterprise platform that will enable your messaging roadmap for years to come.

Open source
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