Best Free and Open Source Alternatives to Microsoft Exchange Server

1

Microsoft Exchange Server

Microsoft Exchange Server is a mail server and calendaring server. It is proprietary software that’s not available for Linux. We recommend the following free and open source alternatives.

#Email #SMTP Server #Calendar

2

Exim

Exim is a message transfer agent (MTA) which is highly configurable, and has features that are lacking in other MTAs. It has always had substantial facilities for mail policy controls, providing facilities for the administrator to control who may send or relay mail through the system.

#SMTP Server #Email #MTA

3

OpenSMTPD

OpenSMTPD is an implementation of the server-side SMTP protocol, with some additional standard extensions. Its design goals include security, reliability, ease of configuration, and support for common use cases.

#SMTP Server #Email #MTA 2 social mentions