Writing a custom Mail Delivery Agent
TL;DR: In this article, I explain what is an MDA and how to write a custom one from scratch using only shell scripting. Shout outs to my patrons ! As usual, a huge thanks goes to the people sponsoring me on patreon, github or liberaPay, the work in this post was made possible by my sponsorship.
What is a Mail Delivery Agent (MDA) ? When a mail enters an SMTP server it is initially stored in the server queue before being moved to its next destination.
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