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That works for GMail but not for a lot of other email providers.



Isn't that part of the email RFCs for 2 decades or so? Postfix certainly supports this for quite a while now.

Edit: sendmail and qmail, too, apparently: https://www.cs.rutgers.edu/~watrous/plus-signs-in-email-addr...


Too bad Comcast/Xfinity and other ISPs don't really provide up-to-spec email clients or servers. Who cute.old.couple@comcast most likely uses.




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