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nerpderp83
on Jan 26, 2018
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How to Run Your Own Mail Server (2017)
Having run both Exim and Postfix, I would highly recommend you run Postfix, if not for the security for the configuration.
If you can't run Postfix, run Exim in a container.
ekiara
on Jan 28, 2018
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Could you expand on this? What security vulnerabilities does Exim4 have that you'd avoid just by choosing Postfix as an alternative?
nerpderp83
on Jan 30, 2018
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Postfix has a very clear separation of concerns and least privledge in the use of lots of helper daemons. Exim4 doesn't not have this architecture and is less secure because of it.
http://www.postfix.org/OVERVIEW.html
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If you can't run Postfix, run Exim in a container.