diff --git a/src/Database/PostUpdate.php b/src/Database/PostUpdate.php
index ff60fff7be..777d541969 100644
--- a/src/Database/PostUpdate.php
+++ b/src/Database/PostUpdate.php
@@ -25,6 +25,7 @@ use Friendica\Core\Logger;
 use Friendica\Core\Protocol;
 use Friendica\DI;
 use Friendica\Model\Contact;
+use Friendica\Model\Conversation;
 use Friendica\Model\GServer;
 use Friendica\Model\Item;
 use Friendica\Model\ItemURI;
@@ -33,6 +34,9 @@ use Friendica\Model\Post;
 use Friendica\Model\Post\Category;
 use Friendica\Model\Tag;
 use Friendica\Model\Verb;
+use Friendica\Protocol\ActivityPub\Processor;
+use Friendica\Protocol\ActivityPub\Receiver;
+use Friendica\Util\JsonLD;
 use Friendica\Util\Strings;
 
 /**
@@ -46,7 +50,7 @@ class PostUpdate
 	// Needed for the helper function to read from the legacy term table
 	const OBJECT_TYPE_POST  = 1;
 
-	const VERSION = 1427;
+	const VERSION = 1452;
 
 	/**
 	 * Calls the post update functions
@@ -104,6 +108,9 @@ class PostUpdate
 		if (!self::update1427()) {
 			return false;
 		}
+		if (!self::update1452()) {
+			return false;
+		}
 		return true;
 	}
 
@@ -1012,4 +1019,70 @@ class PostUpdate
 
 		return false;
 	}
+
+	/**
+	 * Fill the receivers of the post via the raw source
+	 *
+	 * @return bool "true" when the job is done
+	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+	 * @throws \ImagickException
+	 */
+	private static function update1452()
+	{
+		// Was the script completed?
+		if (DI::config()->get('system', 'post_update_version') >= 1452) {
+			return true;
+		}
+
+		$id = DI::config()->get('system', 'post_update_version_1452_id', 0);
+
+		Logger::info('Start', ['uri-id' => $id]);
+
+		$start_id = $id;
+		$rows = 0;
+
+		$conversations = DBA::p("SELECT `post-view`.`uri-id`, `conversation`.`source`, `conversation`.`received` FROM `conversation`
+			INNER JOIN `post-view` ON `post-view`.`uri` = `conversation`.`item-uri`
+			WHERE NOT `source` IS NULL AND `conversation`.`protocol` = ? AND `uri-id` > ? LIMIT ?",
+			Conversation::PARCEL_ACTIVITYPUB, $id, 1000);
+
+		if (DBA::errorNo() != 0) {
+			Logger::error('Database error', ['no' => DBA::errorNo(), 'message' => DBA::errorMessage()]);
+			return false;
+		}
+
+		while ($conversation = DBA::fetch($conversations)) {
+			$id       = $conversation['uri-id'];
+			$received = $conversation['received'];
+
+			$raw = json_decode($conversation['source'], true);
+			if (empty($raw)) {
+				continue;
+			}
+			$activity = JsonLD::compact($raw);
+
+			$urls = Receiver::getReceiverURL($activity);
+			Processor::storeReceivers($conversation['uri-id'], $urls);
+
+			if (!empty($activity['as:object'])) {
+				$urls = array_merge($urls, Receiver::getReceiverURL($activity['as:object']));
+				Processor::storeReceivers($conversation['uri-id'], $urls);
+			}
+			++$rows;
+		}
+
+		DBA::close($conversations);
+
+		DI::config()->set('system', 'post_update_version_1452_id', $id);
+
+		Logger::info('Processed', ['rows' => $rows, 'last' => $id, 'last-received' => $received]);
+
+		if ($start_id == $id) {
+			DI::config()->set('system', 'post_update_version', 1452);
+			Logger::info('Done');
+			return true;
+		}
+
+		return false;
+	}
 }
diff --git a/src/Model/Tag.php b/src/Model/Tag.php
index 17a68f120f..cff678d607 100644
--- a/src/Model/Tag.php
+++ b/src/Model/Tag.php
@@ -48,10 +48,15 @@ class Tag
 	 */
 	const IMPLICIT_MENTION  = 8;
 	/**
-	 * An exclusive mention transfers the ownership of the post to the target account, usually a forum.
+	 * An exclusive mention transmits the post only to the target account without transmitting it to the followers, usually a forum.
 	 */
 	const EXCLUSIVE_MENTION = 9;
 
+	const TO  = 10;
+	const CC  = 11;
+	const BTO = 12;
+	const BCC = 13;
+
 	const TAG_CHARACTER = [
 		self::HASHTAG           => '#',
 		self::MENTION           => '@',
@@ -66,9 +71,8 @@ class Tag
 	 * @param integer $type
 	 * @param string  $name
 	 * @param string  $url
-	 * @param boolean $probing
 	 */
-	public static function store(int $uriid, int $type, string $name, string $url = '', $probing = true)
+	public static function store(int $uriid, int $type, string $name, string $url = '')
 	{
 		if ($type == self::HASHTAG) {
 			// Trim Unicode non-word characters
@@ -77,7 +81,7 @@ class Tag
 			$tags = explode(self::TAG_CHARACTER[self::HASHTAG], $name);
 			if (count($tags) > 1) {
 				foreach ($tags as $tag) {
-					self::store($uriid, $type, $tag, $url, $probing);
+					self::store($uriid, $type, $tag, $url);
 				}
 				return;
 			}
@@ -90,7 +94,7 @@ class Tag
 		$cid = 0;
 		$tagid = 0;
 
-		if (in_array($type, [self::MENTION, self::EXCLUSIVE_MENTION, self::IMPLICIT_MENTION])) {
+		if (in_array($type, [self::MENTION, self::EXCLUSIVE_MENTION, self::IMPLICIT_MENTION, self::TO, self::CC, self::BTO, self::BCC])) {
 			if (empty($url)) {
 				// No mention without a contact url
 				return;
@@ -100,32 +104,13 @@ class Tag
 				Logger::notice('Wrong scheme in url', ['url' => $url, 'callstack' => System::callstack(20)]);
 			}
 
-			if (!$probing) {
-				$condition = ['nurl' => Strings::normaliseLink($url), 'uid' => 0, 'deleted' => false];
-				$contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
-				if (DBA::isResult($contact)) {
-					$cid = $contact['id'];
-					Logger::info('Got id for contact url', ['cid' => $cid, 'url' => $url]);
-				}
-
-				if (empty($cid)) {
-					$ssl_url = str_replace('http://', 'https://', $url);
-					$condition = ['`alias` IN (?, ?, ?) AND `uid` = ? AND NOT `deleted`', $url, Strings::normaliseLink($url), $ssl_url, 0];
-					$contact = DBA::selectFirst('contact', ['id'], $condition, ['order' => ['id']]);
-					if (DBA::isResult($contact)) {
-						$cid = $contact['id'];
-						Logger::info('Got id for contact alias', ['cid' => $cid, 'url' => $url]);
-					}
-				}
-			} else {
-				$cid = Contact::getIdForURL($url, 0, false);
-				Logger::info('Got id by probing', ['cid' => $cid, 'url' => $url]);
-			}
+			$cid = Contact::getIdForURL($url, 0, false);
+			Logger::debug('Got id for contact', ['cid' => $cid, 'url' => $url]);
 
 			if (empty($cid)) {
 				// The contact wasn't found in the system (most likely some dead account)
 				// We ensure that we only store a single entry by overwriting the previous name
-				Logger::info('Contact not found, updating tag', ['url' => $url, 'name' => $name]);
+				Logger::info('URL is not a known contact, updating tag', ['url' => $url, 'name' => $name]);
 				if (!DBA::exists('tag', ['name' => substr($name, 0, 96), 'url' => $url])) {
 					DBA::update('tag', ['name' => substr($name, 0, 96)], ['url' => $url]);
 				}
@@ -133,10 +118,12 @@ class Tag
 		}
 
 		if (empty($cid)) {
-			if (($type != self::HASHTAG) && !empty($url) && ($url != $name)) {
-				$url = strtolower($url);
-			} else {
-				$url = '';
+			if (!in_array($type, [self::TO, self::CC, self::BTO, self::BCC])) {
+				if (($type != self::HASHTAG) && !empty($url) && ($url != $name)) {
+					$url = strtolower($url);
+				} else {
+					$url = '';
+				}
 			}
 
 			$tagid = self::getID($name, $url);
diff --git a/src/Object/Post.php b/src/Object/Post.php
index 0561f5506c..17303bd62d 100644
--- a/src/Object/Post.php
+++ b/src/Object/Post.php
@@ -416,12 +416,6 @@ class Post
 		$direction = [];
 		if (!empty($item['direction'])) {
 			$direction = $item['direction'];
-		} elseif (DI::config()->get('debug', 'show_direction')) {
-			$conversation = DBA::selectFirst('conversation', ['direction'], ['item-uri' => $item['uri']]);
-			if (!empty($conversation['direction']) && in_array($conversation['direction'], [1, 2])) {
-				$direction_title = [1 => DI::l10n()->t('Pushed'), 2 => DI::l10n()->t('Pulled')];
-				$direction = ['direction' => $conversation['direction'], 'title' => $direction_title[$conversation['direction']]];
-			}
 		}
 
 		$languages = [];
diff --git a/src/Protocol/ActivityPub/Processor.php b/src/Protocol/ActivityPub/Processor.php
index 5196f446c6..79d24d1602 100644
--- a/src/Protocol/ActivityPub/Processor.php
+++ b/src/Protocol/ActivityPub/Processor.php
@@ -526,6 +526,8 @@ class Processor
 		self::storeFromBody($item);
 		self::storeTags($item['uri-id'], $activity['tags']);
 
+		self::storeReceivers($item['uri-id'], $activity['receiver_urls'] ?? []);
+
 		$item['location'] = $activity['location'];
 
 		if (!empty($activity['latitude']) && !empty($activity['longitude'])) {
@@ -756,6 +758,22 @@ class Processor
 		}
 	}
 
+	public static function storeReceivers(int $uriid, array $receivers)
+	{
+		foreach (['as:to' => Tag::TO, 'as:cc' => Tag::CC, 'as:bto' => Tag::BTO, 'as:bcc' => Tag::BCC] as $element => $type) {
+			if (!empty($receivers[$element])) {
+				foreach ($receivers[$element] as $receiver) {
+					if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
+						$name = Receiver::PUBLIC_COLLECTION;
+					} else {
+						$name = trim(parse_url($receiver, PHP_URL_PATH), '/');
+					}
+					Tag::store($uriid, $type, $name, $receiver);
+				}
+			}
+		}
+	}
+
 	/**
 	 * Creates an mail post
 	 *
diff --git a/src/Protocol/ActivityPub/Receiver.php b/src/Protocol/ActivityPub/Receiver.php
index 003cae0c9f..e82745b755 100644
--- a/src/Protocol/ActivityPub/Receiver.php
+++ b/src/Protocol/ActivityPub/Receiver.php
@@ -297,12 +297,18 @@ class Receiver
 			$reception_types[$data['uid']] = $data['type'] ?? self::TARGET_UNKNOWN;
 		}
 
+		$urls = self::getReceiverURL($activity);
+
 		// When it is a delivery to a personal inbox we add that user to the receivers
 		if (!empty($uid)) {
 			$additional = [$uid => $uid];
 			$receivers = array_replace($receivers, $additional);
 			if (empty($activity['thread-completion']) && (empty($reception_types[$uid]) || in_array($reception_types[$uid], [self::TARGET_UNKNOWN, self::TARGET_FOLLOWER, self::TARGET_ANSWER, self::TARGET_GLOBAL]))) {
 				$reception_types[$uid] = self::TARGET_BCC;
+				$owner = User::getOwnerDataById($uid);
+				if (!empty($owner['url'])) {
+					$urls['as:bcc'][] = $owner['url'];
+				}
 			}
 		}
 
@@ -408,6 +414,12 @@ class Receiver
 			$object_data['object_type'] = $object_type;
 		}
 
+		foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
+			if (!empty($urls[$element])) {
+				$object_data['receiver_urls'][$element] = array_unique(array_merge($object_data['receiver_urls'][$element] ?? [], $urls[$element]));
+			}
+		}
+
 		$object_data['type'] = $type;
 		$object_data['actor'] = $actor;
 		$object_data['item_receiver'] = $receivers;
@@ -679,6 +691,27 @@ class Receiver
 		return $uid;
 	}
 
+	public static function getReceiverURL($activity)
+	{
+		$urls = [];
+
+		foreach (['as:to', 'as:cc', 'as:bto', 'as:bcc'] as $element) {
+			$receiver_list = JsonLD::fetchElementArray($activity, $element, '@id');
+			if (empty($receiver_list)) {
+				continue;
+			}
+
+			foreach ($receiver_list as $receiver) {
+				if ($receiver == self::PUBLIC_COLLECTION) {
+					$receiver = ActivityPub::PUBLIC_COLLECTION;
+				}
+				$urls[$element][] = $receiver;
+			}
+		}
+
+		return $urls;
+	}
+
 	/**
 	 * Fetch the receiver list from an activity array
 	 *
@@ -1508,7 +1541,8 @@ class Receiver
 			$reception_types[$data['uid']] = $data['type'] ?? 0;
 		}
 
-		$object_data['receiver'] = $receivers;
+		$object_data['receiver_urls']  = self::getReceiverURL($object);
+		$object_data['receiver']       = $receivers;
 		$object_data['reception_type'] = $reception_types;
 
 		$object_data['unlisted'] = in_array(-1, $object_data['receiver']);
diff --git a/src/Protocol/ActivityPub/Transmitter.php b/src/Protocol/ActivityPub/Transmitter.php
index 884f9430f1..c65265396e 100644
--- a/src/Protocol/ActivityPub/Transmitter.php
+++ b/src/Protocol/ActivityPub/Transmitter.php
@@ -424,7 +424,7 @@ class Transmitter
 	}
 
 	/**
-	 * Returns an array with permissions of a given item array
+	 * Returns an array with permissions of the thread parent of the given item array
 	 *
 	 * @param array $item
 	 *
@@ -432,34 +432,25 @@ class Transmitter
 	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
-	private static function fetchPermissionBlockFromConversation($item)
+	public static function fetchPermissionBlockFromThreadParent($item)
 	{
-		if (empty($item['thr-parent'])) {
+		if (empty($item['thr-parent-id'])) {
 			return [];
 		}
 
-		$condition = ['item-uri' => $item['thr-parent'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB];
-		$conversation = DBA::selectFirst('conversation', ['source'], $condition);
-		if (!DBA::isResult($conversation)) {
+		$parent = Post::selectFirstPost(['author-link'], ['uri-id' => $item['thr-parent-id']]);
+		if (empty($parent)) {
 			return [];
 		}
 
 		$permissions = [
-			'to' => [],
+			'to' => [$parent['author-link']],
 			'cc' => [],
 			'bto' => [],
 			'bcc' => [],
 		];
 
-		$activity = json_decode($conversation['source'], true);
-
-		$actor = JsonLD::fetchElement($activity, 'actor', 'id');
-		if (!empty($actor)) {
-			$permissions['to'][] = $actor;
-			$profile = APContact::getByURL($actor);
-		} else {
-			$profile = [];
-		}
+		$parent_profile = APContact::getByURL($parent['author-link']);
 
 		$item_profile = APContact::getByURL($item['author-link']);
 		$exclude[] = $item['author-link'];
@@ -468,26 +459,15 @@ class Transmitter
 			$exclude[] = $item['owner-link'];
 		}
 
-		foreach (['to', 'cc', 'bto', 'bcc'] as $element) {
-			if (empty($activity[$element])) {
-				continue;
-			}
-			if (is_string($activity[$element])) {
-				$activity[$element] = [$activity[$element]];
-			}
-
-			foreach ($activity[$element] as $receiver) {
-				if (empty($receiver)) {
-					continue;
-				}
-
-				if (!empty($profile['followers']) && $receiver == $profile['followers'] && !empty($item_profile['followers'])) {
-					$permissions[$element][] = $item_profile['followers'];
-				} elseif (!in_array($receiver, $exclude)) {
-					$permissions[$element][] = $receiver;
-				}
+		$type = [Tag::TO => 'to', Tag::CC => 'cc', Tag::BTO => 'bto', Tag::BCC => 'bcc'];
+		foreach (Tag::getByURIId($item['thr-parent-id'], [Tag::TO, Tag::CC, Tag::BTO, Tag::BCC]) as $receiver) {
+			if (!empty($parent_profile['followers']) && $receiver['url'] == $parent_profile['followers'] && !empty($item_profile['followers'])) {
+				$permissions[$type[$receiver['type']]][] = $item_profile['followers'];
+			} elseif (!in_array($receiver['url'], $exclude)) {
+				$permissions[$type[$receiver['type']]][] = $receiver['url'];
 			}
 		}
+
 		return $permissions;
 	}
 
@@ -573,7 +553,7 @@ class Transmitter
 				$data['cc'][] = $announce['actor']['url'];
 			}
 
-			$data = array_merge($data, self::fetchPermissionBlockFromConversation($item));
+			$data = array_merge($data, self::fetchPermissionBlockFromThreadParent($item));
 
 			// Check if the item is completely public or unlisted
 			if ($item['private'] == Item::PUBLIC) {
@@ -721,6 +701,19 @@ class Transmitter
 			unset($receivers['bcc']);
 		}
 
+		foreach (['to' => Tag::TO, 'cc' => Tag::CC, 'bcc' => Tag::BCC] as $element => $type) {
+			if (!empty($receivers[$element])) {
+				foreach ($receivers[$element] as $receiver) {
+					if ($receiver == ActivityPub::PUBLIC_COLLECTION) {
+						$name = Receiver::PUBLIC_COLLECTION;
+					} else {
+						$name = trim(parse_url($receiver, PHP_URL_PATH), '/');
+					}
+					Tag::store($item['uri-id'], $type, $name, $receiver);
+				}
+			}
+		}
+
 		return $receivers;
 	}
 
diff --git a/static/defaults.config.php b/static/defaults.config.php
index 3cde0bfd49..c31446cfef 100644
--- a/static/defaults.config.php
+++ b/static/defaults.config.php
@@ -616,10 +616,6 @@ return [
 		// Logs every call to /inbox as a JSON file in Friendica's temporary directory
 		'ap_inbox_log' => false,
 
-		// show_direction (Boolean)
-		// Display if a post had been fetched or had been pushed towards our server
-		'show_direction' => false,
-
 		// total_ap_delivery (Boolean)
 		// Deliver via AP to every possible receiver and we suppress the delivery to these contacts with other protocols
 		'total_ap_delivery' => false,