Email validation with german umlauts

[martin-skroch]

I have the problem that the email validation fails if I use an email with german umlauts.

I know, laravel use the filter_var function of php with the filter FILTER_VALIDATE_EMAIL, but this is outdated, because there are so-called IDNs (Internationalized domain names) which are not considered in this filter.

Now we can wait until php reworked it or we can implement an alternative respectively a small solution to convert the domain of an emal to ascii with idn_to_ascii(). The only drawback is that this function requires the intl extension for php.

Here, I have found a solution which works for me. I have implemented a Custom Validation Rules like so:

Validator::extend('idn_email', function($attribute, $value, $parameters, $validator) {
    $valueParts = explode('@', $value);
    return count($valueParts) == 2 && filter_var($valueParts[0].'@'.idn_to_ascii($valueParts[1]), FILTER_VALIDATE_EMAIL) !== false;
});

This solution only convert the domain name from idn in ascii and then we can use the filter_var again.

I think it is a clean solution. What do you say?

[themsaid]

I think you might consider sending a PR with the fix.

[martin-skroch]

That was my first thought, but I wanted to ask first whether it makes sense.

It seems to make sense, but I forgot to mention that the idn_to_ascii() function requires the intl extension for php. This must be updated in the Server Requirements.

[GrahamCampbell]

Emails with international characters are invalid email addresses, and swiftmailer will not allow you to send messages to them.

[driade]

Hello, good morning.

Ran on my tests with the same problem. It seems Swiftmailer is going to fix this in the next release.

swiftmailer/swiftmailer#409

Maybe it'd be "optimal" not to rely more on FILTER_VALIDATE_EMAIL and switch to "Swift_Validate::email", which seems more complete and, in the near future, will address this problem.

Not an expert on the issue but tried to send an email to "áéí@foo.com" and my email client (Mail on Mac) won't let me, though it let me "test@españa.com" through gmail with no further problems.

FILTER_VALIDATE_EMAIL fails to validate "test@españa.com".

@GrahamCampbell might be interesting reopening the issue?