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Comment Re:Alternatives? (Score 3, Interesting) 77

There are a few all-in-one "batteries included" solutions based on Docker. They include a mail server, webmail, automated letsencrypt, a web-based administration UI, and they tell you clearly which entries to put in your DNS. Personally, I've had a good experience with Mailcow Dockerized, but that's not the only option.

Comment Re:registered-only list. (Score 1) 51

There is no need for an explicit database; this problem is trivial to solve with cryptographic signatures. We already do the same thing for wireless networks, it's in the 802.11 protocol.

Of course, this only stops casual spoofers: if a three-letter agency is tracking you, they can kindly ask the Telco to give them the private key, exactly like they can ask to be included in the database.

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