With the release of Laravel 5.8 e-mail validation changed to comply with the RFC standards. That means when using the email rule the following e-mail address will now pass: user@tld. This may be great for local intranets that utilize e-mail addresses like this, but who is really doing that? Most are trying to validate e-mails in the following format: user@sld.tld. Before Laravel 5.8 this technically valid e-mail address would fail, but that was also how the majority of Laravel developers wanted it to work.

This e-mail validation rule works in conjunction with Laravel's built in email rule to also require domains to have at least a second level domain. To use this rule you would write something like: 'email' => ['required', 'email', new EmailHasSecondLevelDomain()]. Now e-mails will validate the way you expect for a public Internet website.

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class EmailHasSecondLevelDomain implements Rule
{
    /**
     * Technically a valid e-mail is:
     *
     * user@com
     * user@localhost
     *
     * However, we want to deny these sort of e-mails and require a secondary domain
     *
     * @param  string  $attribute
     * @param  mixed  $value
     * @return bool
     */
    public function passes($attribute, $value)
    {
        return preg_match("/\.[a-z]{2,63}$/i", $value);
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        return 'E-mail address must have a second level domain such as user@sld.tld';
    }
}

This code snippet was published on Jul 12, 2019, at 00:00:00 (UTC). It was last edited on Mar 11, 2024, at 19:07:26 (UTC).