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Re:Ask HN: Why can't I host my own email? by throw0101a on Wednesday April 27, 2022 @07:14PM (#31186986)
> Why allow emails without authentication?

Because the people on the 'net were generally not bad actors back in the day, so we would you need to lock things down?

Re:Ask HN: Why can't I host my own email? by Aeolun on Wednesday April 27, 2022 @09:46PM (#31187931)
Hmm, now the internet is a dark forest. Leave anything open/visible, and all the bad actors immediately swamp you.