diff --git a/src/classes/Models/ProfilePollQueue.php b/src/classes/Models/ProfilePollQueue.php
index ad660c7..e3868f0 100644
--- a/src/classes/Models/ProfilePollQueue.php
+++ b/src/classes/Models/ProfilePollQueue.php
@@ -2,6 +2,8 @@
 
 namespace Friendica\Directory\Models;
 
+use Friendica\Directory\Utils\Network;
+
 /**
  * @author Hypolite Petovan <mrpetovan@gmail.com>
  */
@@ -15,6 +17,15 @@ class ProfilePollQueue extends \Friendica\Directory\Model
 			return false;
 		}
 
+		$host = parse_url($url, PHP_URL_HOST);
+		if (!$host) {
+			return false;
+		}
+
+		if (Network::isPublicHost($host)) {
+			return false;
+		}
+
 		$this->atlas->perform(
 			'INSERT IGNORE INTO `profile_poll_queue` SET `profile_url` = :profile_url',
 			['profile_url' => $url]