There are a frightening number of systems that don’t allow “-”, which isn’t even an edge case. A lot of people - mostly women - hyphenate their last names on marriage, rather than throw their old name away. My wife did. She legally changed her name when she came of age, and when we met and married years later she said, “I paid for money for my name; I’m not letting it go.” (Note: I wasn’t pressuring her to take my name.) So she hyphenated it, and has come to regret the decision. She says she should have switched, or not, but the hyphen causes problems everywhere. It’s not a legal character in a lot of systems, including some government systems.
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.
Yeah, I’m just saying that the benefit of using such a regex isn’t massive (unless you’re building a service which can’t send a mail).
a@b is a syntactically correct e-mail address. Most combinations of letters, an @-symbol and more letters will be syntactically correct, which is what most typos will look like. The regex will only catch fringe cases, such as a user accidentally hitting the spacebar.
And then, personally, I don’t feel like it’s worth pulling in one of those massive regexes (+ possibly a regex library) for most use-cases.
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.
There is some danger that common usage and widespread sloppy coding will establish a de facto standard for e-mail addresses that is more restrictive than the recorded formal standard.
There are a frightening number of systems that don’t allow “-”, which isn’t even an edge case. A lot of people - mostly women - hyphenate their last names on marriage, rather than throw their old name away. My wife did. She legally changed her name when she came of age, and when we met and married years later she said, “I paid for money for my name; I’m not letting it go.” (Note: I wasn’t pressuring her to take my name.) So she hyphenated it, and has come to regret the decision. She says she should have switched, or not, but the hyphen causes problems everywhere. It’s not a legal character in a lot of systems, including some government systems.
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.
https://datatracker.ietf.org/doc/html/rfc5322
Yeah, I’m just saying that the benefit of using such a regex isn’t massive (unless you’re building a service which can’t send a mail).
a@bis a syntactically correct e-mail address. Most combinations of letters, an @-symbol and more letters will be syntactically correct, which is what most typos will look like. The regex will only catch fringe cases, such as a user accidentally hitting the spacebar.And then, personally, I don’t feel like it’s worth pulling in one of those massive regexes (+ possibly a regex library) for most use-cases.
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.
Reasonable and viable ≠ RFC compliant
This quote summarises my views: