I suppose it would be trivial to simply block or severely throttle high-volume SMTP traffic?

Gathering6678 • last Wednesday at 6:39 AM • 2 replies • view on HN

userbinator • last Wednesday at 6:54 AM

Additionally, this will make it look like you're a spammer.

stackskipton • last Wednesday at 2:19 PM

You could block SMTP on almost all end user networks with no one noticing. 99.9+% of email client submission is HTTPS.

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