dan, 7 months ago

@Edent I once volunteered with a helpline organisation whose email software didn't believe it was legitimate to have an apostrophe in an email address, and refused to let me reply to a person in need on account of them having such a thing!

(The email address wasn't even their choice. They were using an email address assigned by their employer, who allocated firstname.surname@ email addresses, and their surname used the anglicised O' version of traditional Irish patronymic "Ó" surnames. Not that that makes a difference.)

AMS, 7 months ago

@Edent Really, check for '@' and check you can resolve the part after '@' (maybe is there a MX for it). Then you're good.

Edent, 7 months ago

@AMS
That's the literal opposite problem to what I'm talking about.

simevidas, 7 months ago

@Edent

<input id=user>

user.onchange = () => {
let input = document.createElement('input');
input.type = 'email';
input.required = true;
input.value = user.value;
if (input.validity.valid) {
// show error message
}
};

https://output.jsbin.com/jafovub/quiet

faraixyz, 7 months ago

@Edent is it bad that I think the apostrophe is the most confusing part of that email?

Edent, 7 months ago

@faraixyz it trips up so many people!

mart_brooks, 7 months ago

@Edent Opinion: the only way to validate an email address is to send an email to it. And even that's not guaranteed because of leaky non-standards based SMTP gateways to walled gardens such as gmail and o365.