Alter core e-mail validation.

This hook is called immediately after core e-mail validation takes place and gives other modules a chance to override it. This is useful in cases where you want to have stricter or looser validation standards than that provided by Drupal core.

Parameters

$valid: Boolean value referencing the validation result.

$mail: E-mail address being validated.

See also

valid_email_address()

Related topics

1 function implements hook_valid_email_address_alter()

Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.

user_email_validation_test_valid_email_address_alter in modules/user/tests/user_email_validation_test.module

Implements hook_valid_email_address_alter().

1 invocation of hook_valid_email_address_alter()

valid_email_address in includes/common.inc

Verifies the syntax of the given e-mail address.

File

modules/system/system.api.php, line 4836

Code

function hook_valid_email_address_alter(&$valid, $mail) {
    if (preg_match("/^([a-zA-Z0-9])+([a-zA-Z0-9\\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\\._-]+)+\$/", $mail)) {
        list($username, $domain) = explode('@', $mail);
        // Check DNS records.
        if (checkdnsrr($domain, 'MX')) {
            $valid = TRUE;
        }
    }
    $valid = FALSE;
}

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