It boggles my mind how so many websites and platforms incorrectly say my e-mail address is ‘invalid’ because it has an apostrophe in it.
No. It is NOT invalid. I have been receiving e-mails for years. You just have a shitty developer.
worst thing is, the regex to check email has been available for decades and it’s fine with apostrophies
Well, and remember: If in doubt, send them an e-mail. You probably want to do that anyways to ensure they have access to that mailbox.
You can try to use a regex as a basic sanity check, so they’ve not accidentally typed a completely different info into there, but the e-mail standard allows so many wild mail addresses, that your basic sanity check might as well be whether they’ve typed an into there.
The regexes are written to comply with RFC 5332 and 6854
They are well defined and you can absolutely definitively check whether an address is allowable or not.
There are many regexes that validate email, and they usually aren’t compliant with the RFC, there are some details in the very old answer on SO. So, better not validate and just send a confirmation, than restrict and lock people out, imo
The article you just mentioned in the comments includes both a completely reasonable and viable regex and binary and library alternatives that are in most languages.
