BlacklistTable::hasBlacklistedEmails

static function hasBlacklistedEmails()
{
	static $hasEmails = null;
	if ($hasEmails === null)
	{
		$row = static::getRow([
			'select' => ['ID'],
			'limit' => 1,
			'order' => ['ID' => 'ASC'],
			'cache' => ['ttl' => 36000]
		]);

		$hasEmails = $row !== null;
	}

	return $hasEmails;
}