Jokes aside, I have been blocked many times by overzealous email validation. Yes, my email has a plus sign in it. This is allowed under RFC5322, so deal with it. It is better to have no validation at all than incorrect validation.

[–] elvith@feddit.org 170 points 2 weeks ago* (last edited 2 weeks ago) (6 children)

A plus sign? That's nothing, LOL

Quote:

If you disagree, or have any other comments, feel free to email me at
'*+-/=?^_`{|}~#$@[IPv6:2602:f977:800:0:e276:63ff:fe72:3900]
-- if your mail client lets you, that is.

[–] mormegil@programming.dev 3 points 2 weeks ago

Because of one smartass customer who insisted on doing exact RFC 822 validation, I implemented exactly that. And yes,

zKcknV|NGv.lI66vR#@X`QcRK4K.R`?NpA.Gc2Kqzue9.%&nb1kGWp/./#Och$RQv

is one of the test cases for a valid addr-spec. See (or generate) some others at https://github.com/mormegil-cz/rfcemailvalidator

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