After having mastered the set up of a LAMP server (Apache, MySQL, PHP, PHPMyAdmin) solution on my Raspberry Pi 3, and rounding it out with with a cloud solution for the file server (OwnCloud), and a content manager for the web server (Joomla), it was time for the next step: a mail server. Many thanks to Sam Hobbs, who invested countless hours in documenting and perfecting the Pi implementation, and carefully explaining it in detail. His instructions are more elaborate than mine, and worth visiting, as I have simplified his implementation significantly, and there are other features that he has implemented which you may want to replicate.
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