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@@ -392,6 +392,7 @@ Comparison of NoSQL servers: http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-v
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* [Postfix](http://www.postfix.org/) - Fast, easy to administer, and secure Sendmail replacement.
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* [Qmail](http://cr.yp.to/qmail.html) - Secure Sendmail replacement.
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* [Sendmail](http://www.sendmail.com/sm/open_source/) - Message transfer agent (MTA).
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+* [Mail-in-a-Box](https://mailinabox.email/) - Take back control of your email with this easy-to-deploy mail server in a box.
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## Software Containers
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*Operating system–level virtualization.*
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phre4k