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[JammyDodger]

I thought this one was interesting too

Protecting against gmail dot trick in Discourse

I reverted my change here and instead introduced this new awesome default. https://github.com/discourse/discourse/commit/cbceadf48b60b29fb710586e2b03bde4c5fe0883 This means that if evil.person+77@gmail.com gets blocked we will go ahead and block evilperson@gmail.com instead. Then when e.v.i.l.person@gmail.com tries to sneak in they will be blocked due to canonical matching. This entirely solves the OP here, and is a very clean and safe change all Discourse instances can benefit from. Going …