NethServer 6 » Nethgui

        if (strlen($value) > 254) {

            $this->addFailureInfo('valid_email,too-long');

            return FALSE;

        }

        $parts = explode('@', $value, 2);

        if ( ! isset($parts[0]) || $parts[0] === '') {

            $this->addFailureInfo('valid_email,missing-localpart');

            return FALSE;

        }

        $localPart = $parts[0];

        if (strlen($localPart) > 64 || preg_match('/^[A-Za-z0-9_-](\.?[A-Za-z0-9_-]+)*$/', $localPart) == 0) {

            $this->addFailureInfo('valid_email,malformed-localpart');

            return FALSE;

        }

        if ( ! isset($parts[1])) {

            $this->addFailureInfo('valid_email,missing-domainpart');

            return FALSE;

        }

        $domainPart = $parts[1];

        if ( ! $this->evalHostname($domainPart, 0, PHP_INT_MAX)) {

            $this->addFailureInfo('valid_email,malformed-domainpart');

            return FALSE;

        }