If I'm trying to host my own email, it would seem that I need to make sure the reverse DNS is set up correctly. But where? The hosting provider (where I rent the machine) say's the domain is managed by Gandi, which is correct. But they don't offer a web UI to do this. Is this something I set up on my own machine?
alexschroeder.ch/wiki/2019-03-

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@kensanata depends on the provider. I once had to file a support ticket to have rdns changed

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