Unsubscription requirements are a pain in the ass in the sense that anyone that ... | Hacker News

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		pixl97 on Oct 30, 2023 \| parent \| context \| favorite \| on: Gmail, Yahoo announce new 2024 authentication requ... Unsubscription requirements are a pain in the ass in the sense that anyone that steals a large list of emails (from any service, not yours in this particular case) could now run it against your service and unsubscribe a million users before you realize what's going on via a botnet.

TheCycoONE on Oct 30, 2023 [–]

The opaque id is suppose to not be guessable. I does mean you can't batch send emails by calling RCPT TO though which will hurt bandwidth.

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