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While some companies filter against this, most email services support plus addressing to accomplish the same thing. You can register under myemail+foobar.com@gmail.com, for instance, and all emails will still be delivered to myemail@gmail.com

https://gmail.googleblog.com/2008/03/2-hidden-ways-to-get-mo...

https://learn.microsoft.com/en-us/exchange/recipients-in-exc...

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This is very common, so lots of spammers will just drop the plus-part with a regex. Many sites even prevent signing up with an address containing a plus.

Not trying to tell you to stop though, this is definitely a good idea, when it works.

The downside on that is that your original email address is still in there and good luck blocking mails to that.

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