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A comment on Ask HN: Why does adding '+FB' to an email still deliver to the original address?. Parent comment

Re:Ask HN: Why does adding '+FB' to an email still deliver t... by IcePic on Thursday August 15, 2024 @02:37AM (#41253603)
It's not gmail specific, it's standardized as a "sub-address" and not part of the username of the email. smtp has worked like this since the 90s at least.
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Re:Ask HN: Why does adding '+FB' to an email still deliver t... by solardev on Thursday August 15, 2024 @01:49PM (#41258622)
Do you have a cite for this? AFAIK "plus addressing" always been an optional implementation done by certain email providers themselves, but wasn't an actual part of the standards.
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