> there should be a built-in way to filter who can email you, and a way to block unknown senders by default. It is possible to do both with email [1], but you

> there should be a built-in way to filter who can email you, and a way to block unknown senders by default. It is possible to do both with email [1], but you have to run your own email to do so. You don't get those features by using gmail (or any of the other providers). [1] https://en.wikipedia.org/wiki/Procmail https://en.wikipedia.org/wiki/Procmail