I was interested in hosting my own mail server that provides a similar level of privacy for users as Protonmail, ie the server admin cannot read any emails, even those which are not E2EE with PGP. Is there a self-hostable solution to this?
I’m aware the server admin can’t read emails that were sent encrypted using the user’s PGP key, but most emails I get are automated emails from companies/services/etc without the option to upload a public key to send the user encrypted email. If you’re with a service like Protonmail, the server admin still cannot read even these emails.
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That’s a great point about alias use in roundcube. I can see how it could get confusing if you accidentally reply with your real address. This is where I think alias services that handle that automatically really shine. Have you ever run into other limitations or surprises with self-hosting, like with spam filtering or uptime? I imagine it could be quite time-consuming to keep up with all the configurations and updates, especially if you’re aiming to maintain strong privacy protections.
Not really, it’s been pretty effortless. Every couple months I have to make sure my renewed LetsEncrypt certs really got imported, but I don’t think I’ve had to intervene manually for anything in a long time.