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It reminds me a gag from the last season of What we do in the shadow. A character puts a toothpick on his lip and suddenly none of the other characters recognise him.

Like if spammers and hackers were not aware of the + notation, and like if it wasn’t trivial to extract the underlying email address by removing anything after the +...

Unless you have an alias that completely obfuscate the underlying email, I just don’t see the point.

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I agree. But there are other corner cases where that would be helpful. I’ve worked at a lot of software as a service companies where your email address has to be unique per client for a multi tenant system.

We would create different users for different roles. I would love to be able to use one email address distinguished with a tag.

I use these all the time with my outlook.com account (and Gmail before that). You are right that they don't help with spam. However, they add an extra layer of security because now my logins have both a unique email address and password. Of course, a password manager is mandatory.

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