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> The only thing you should NOT do is attempt to host your own email server on a home internet connection.

You can tunnel the relevant ports through a VPS though.

There are quite a few more things that you shouldn't do.

Any VPS that is capable of tunneling SMTP/IMAP ports to your home machine is also capable of simply being your mail server.

Source: Me running mail servers on VPS since they've existed.

Absolutely. Grandparent comment was about running a server at home.

(Among other capabilities, a VPS is capable of being read by your hosting provider or whoever can get them to give access)