diff --git a/mod/display.php b/mod/display.php
index 047f752c98..1b4508c18d 100644
--- a/mod/display.php
+++ b/mod/display.php
@@ -80,7 +80,7 @@ function display_init(App $a)
 	if (ActivityPub::isRequest()) {
 		$wall_item = Item::selectFirst(['id', 'uid'], ['guid' => $item['guid'], 'wall' => true]);
 		if ($wall_item['uid'] == 180) {
-			$data = ActivityPub::createActivityFromItem($wall_item['id']);
+			$data = ActivityPub::createObjectFromItemID($wall_item['id']);
 			echo json_encode($data);
 			exit();
 		}
diff --git a/src/Model/Item.php b/src/Model/Item.php
index b9cc6c2b9a..e590c0c5c5 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -2851,7 +2851,7 @@ class Item extends BaseObject
 	}
 
 	// returns an array of contact-ids that are allowed to see this object
-	private static function enumeratePermissions($obj)
+	public static function enumeratePermissions($obj)
 	{
 		$allow_people = expand_acl($obj['allow_cid']);
 		$allow_groups = Group::expand(expand_acl($obj['allow_gid']));
diff --git a/src/Model/Term.php b/src/Model/Term.php
index a81241cb42..2623125329 100644
--- a/src/Model/Term.php
+++ b/src/Model/Term.php
@@ -33,6 +33,17 @@ class Term
 		return $tag_text;
 	}
 
+	public static function tagArrayFromItemId($itemid)
+	{
+		$condition = ['otype' => TERM_OBJ_POST, 'oid' => $itemid, 'type' => [TERM_HASHTAG, TERM_MENTION]];
+		$tags = DBA::select('term', ['type', 'term', 'url'], $condition);
+		if (!DBA::isResult($tags)) {
+			return [];
+		}
+
+		return DBA::toArray($tags);
+	}
+
 	public static function fileTextFromItemId($itemid)
 	{
 		$file_text = '';
diff --git a/src/Protocol/ActivityPub.php b/src/Protocol/ActivityPub.php
index 9fb22b2bd9..c148e26c69 100644
--- a/src/Protocol/ActivityPub.php
+++ b/src/Protocol/ActivityPub.php
@@ -13,6 +13,7 @@ use Friendica\Core\Protocol;
 use Friendica\Model\Conversation;
 use Friendica\Model\Contact;
 use Friendica\Model\Item;
+use Friendica\Model\Term;
 use Friendica\Model\User;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Crypto;
@@ -153,6 +154,111 @@ class ActivityPub
 		return $data;
 	}
 
+	public static function createPermissionBlockForItem($item)
+	{
+		$data = ['to' => [], 'cc' => []];
+
+		$terms = Term::tagArrayFromItemId($item['id']);
+
+		if (!$item['private']) {
+			$data['to'][] = self::PUBLIC;
+			$data['cc'][] = System::baseUrl() . '/followers/' . $item['author-nick'];
+
+			foreach ($terms as $term) {
+				if ($term['type'] != TERM_MENTION) {
+					continue;
+				}
+				$profile = Probe::uri($term['url'], Protocol::ACTIVITYPUB);
+				if ($profile['network'] == Protocol::ACTIVITYPUB) {
+					$data['cc'][] = $profile['url'];
+				}
+			}
+		} else {
+			$receiver_list = Item::enumeratePermissions($item);
+
+			$mentioned = [];
+
+			foreach ($terms as $term) {
+				if ($term['type'] != TERM_MENTION) {
+					continue;
+				}
+				$cid = Contact::getIdForURL($term['url'], $item['uid']);
+				if (!empty($cid) && in_array($cid, $receiver_list)) {
+					$contact = DBA::selectFirst('contact', ['url'], ['id' => $cid, 'network' => Protocol::ACTIVITYPUB]);
+					$data['to'][] = $contact['url'];
+				}
+			}
+
+			foreach ($receiver_list as $receiver) {
+				$contact = DBA::selectFirst('contact', ['url'], ['id' => $receiver, 'network' => Protocol::ACTIVITYPUB]);
+				$data['cc'][] = $contact['url'];
+			}
+
+			if (empty($data['to'])) {
+				$data['to'] = $data['cc'];
+				unset($data['cc']);
+			}
+		}
+
+		return $data;
+	}
+
+	public static function fetchTargetInboxes($item)
+	{
+		$inboxes = [];
+
+		$terms = Term::tagArrayFromItemId($item['id']);
+		if (!$item['private']) {
+			$contacts = DBA::select('contact', ['notify', 'batch'], ['uid' => $item['uid'], 'network' => Protocol::ACTIVITYPUB]);
+			while ($contact = DBA::fetch($contacts)) {
+				$contact = defaults($contact, 'batch', $contact['notify']);
+				$inboxes[$contact] = $contact;
+			}
+			DBA::close($contacts);
+
+			foreach ($terms as $term) {
+				if ($term['type'] != TERM_MENTION) {
+					continue;
+				}
+				$profile = Probe::uri($term['url'], Protocol::ACTIVITYPUB);
+				if ($profile['network'] == Protocol::ACTIVITYPUB) {
+					$target = defaults($profile, 'batch', $profile['notify']);
+					$inboxes[$target] = $target;
+				}
+			}
+		} else {
+			$receiver_list = Item::enumeratePermissions($item);
+
+			$mentioned = [];
+
+			foreach ($terms as $term) {
+				if ($term['type'] != TERM_MENTION) {
+					continue;
+				}
+				$cid = Contact::getIdForURL($term['url'], $item['uid']);
+				if (!empty($cid) && in_array($cid, $receiver_list)) {
+					$contact = DBA::selectFirst('contact', ['url'], ['id' => $cid, 'network' => Protocol::ACTIVITYPUB]);
+					$profile = Probe::uri($contact['url'], Protocol::ACTIVITYPUB);
+					if ($profile['network'] == Protocol::ACTIVITYPUB) {
+						$target = defaults($profile, 'batch', $profile['notify']);
+						$inboxes[$target] = $target;
+					}
+				}
+			}
+
+			foreach ($receiver_list as $receiver) {
+				$contact = DBA::selectFirst('contact', ['url'], ['id' => $receiver, 'network' => Protocol::ACTIVITYPUB]);
+				$profile = Probe::uri($contact['url'], Protocol::ACTIVITYPUB);
+				if ($profile['network'] == Protocol::ACTIVITYPUB) {
+					$target = defaults($profile, 'batch', $profile['notify']);
+					$inboxes[$target] = $target;
+				}
+			}
+		}
+
+		return $inboxes;
+	}
+
 	public static function createActivityFromItem($item_id)
 	{
 		$item = Item::selectFirst([], ['id' => $item_id]);
@@ -177,13 +283,34 @@ class ActivityPub
 			'toot' => 'http://joinmastodon.org/ns#']]];
 
 		$data['type'] = 'Create';
-		$data['id'] = $item['uri'] . '/activity';
+		$data['id'] = $item['uri'] . '#activity';
 		$data['actor'] = $item['author-link'];
-		$data['to'] = 'https://www.w3.org/ns/activitystreams#Public';
+		$data = array_merge($data, ActivityPub::createPermissionBlockForItem($item));
+
 		$data['object'] = self::createNote($item);
 		return $data;
 	}
 
+	public static function createObjectFromItemID($item_id)
+	{
+		$item = Item::selectFirst([], ['id' => $item_id]);
+
+		if (!DBA::isResult($item)) {
+			return false;
+		}
+
+		$data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1',
+			['Emoji' => 'toot:Emoji', 'Hashtag' => 'as:Hashtag', 'atomUri' => 'ostatus:atomUri',
+			'conversation' => 'ostatus:conversation', 'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri',
+			'ostatus' => 'http://ostatus.org#', 'sensitive' => 'as:sensitive',
+			'toot' => 'http://joinmastodon.org/ns#']]];
+
+		$data = array_merge($data, self::createNote($item));
+
+
+		return $data;
+	}
+
 	public static function createNote($item)
 	{
 		$data = [];
@@ -203,9 +330,7 @@ class ActivityPub
 
 		$data['context'] = $data['conversation'] = $conversation_uri;
 		$data['actor'] = $item['author-link'];
-		if (!$item['private']) {
-			$data['to'] = 'https://www.w3.org/ns/activitystreams#Public';
-		}
+		$data = array_merge($data, ActivityPub::createPermissionBlockForItem($item));
 		$data['published'] = DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM);
 		$data['updated'] = DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM);
 		$data['attributedTo'] = $item['author-link'];
diff --git a/src/Worker/APDelivery.php b/src/Worker/APDelivery.php
new file mode 100644
index 0000000000..b7e881c7a3
--- /dev/null
+++ b/src/Worker/APDelivery.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ * @file src/Worker/APDelivery.php
+ */
+namespace Friendica\Worker;
+
+use Friendica\BaseObject;
+use Friendica\Protocol\ActivityPub;
+use Friendica\Model\Item;
+
+class APDelivery extends BaseObject
+{
+	public static function execute($cmd, $item_id, $inbox)
+	{
+		logger('Invoked: ' . $cmd . ': ' . $item_id . ' to ' . $inbox, LOGGER_DEBUG);
+
+		if ($cmd == Delivery::MAIL) {
+		} elseif ($cmd == Delivery::SUGGESTION) {
+		} elseif ($cmd == Delivery::RELOCATION) {
+		} else {
+			$item = Item::selectFirst(['uid'], ['id' => $item_id]);
+			$data = ActivityPub::createActivityFromItem($item_id);
+			ActivityPub::transmit($data, $inbox, $item['uid']);
+		}
+
+		return;
+	}
+}
diff --git a/src/Worker/Delivery.php b/src/Worker/Delivery.php
index 8ee00af630..e0a5c09c27 100644
--- a/src/Worker/Delivery.php
+++ b/src/Worker/Delivery.php
@@ -15,7 +15,6 @@ use Friendica\Model\Item;
 use Friendica\Model\Queue;
 use Friendica\Model\User;
 use Friendica\Protocol\DFRN;
-use Friendica\Protocol\ActivityPub;
 use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\Email;
 
@@ -166,10 +165,6 @@ class Delivery extends BaseObject
 
 		switch ($contact['network']) {
 
-			case Protocol::ACTIVITYPUB:
-				self::deliverActivityPub($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
-				break;
-
 			case Protocol::DFRN:
 				self::deliverDFRN($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup);
 				break;
@@ -388,80 +383,6 @@ class Delivery extends BaseObject
 		logger('Unknown mode ' . $cmd . ' for ' . $loc);
 	}
 
-	/**
-	 * @brief Deliver content via ActivityPub
-q	 *
-	 * @param string  $cmd            Command
-	 * @param array   $contact        Contact record of the receiver
-	 * @param array   $owner          Owner record of the sender
-	 * @param array   $items          Item record of the content and the parent
-	 * @param array   $target_item    Item record of the content
-	 * @param boolean $public_message Is the content public?
-	 * @param boolean $top_level      Is it a thread starter?
-	 * @param boolean $followup       Is it an answer to a remote post?
-	 */
-	private static function deliverActivityPub($cmd, $contact, $owner, $items, $target_item, $public_message, $top_level, $followup)
-	{
-		// We don't treat Forum posts as "wall-to-wall" to be able to post them via ActivityPub
-		$walltowall = $top_level && ($owner['id'] != $items[0]['contact-id']) & ($owner['account-type'] != Contact::ACCOUNT_TYPE_COMMUNITY);
-
-		if ($public_message) {
-			$loc = 'public batch ' . $contact['batch'];
-		} else {
-			$loc = $contact['addr'];
-		}
-
-		logger('Deliver ' . $target_item["guid"] . ' via ActivityPub to ' . $loc);
-
-//		if (Config::get('system', 'dfrn_only') || !Config::get('system', 'diaspora_enabled')) {
-//			return;
-//		}
-		if ($cmd == self::MAIL) {
-//			ActivityPub::sendMail($target_item, $owner, $contact);
-			return;
-		}
-
-		if ($cmd == self::SUGGESTION) {
-			return;
-		}
-//		if (!$contact['pubkey'] && !$public_message) {
-//			logger('No public key, no delivery.');
-//			return;
-//		}
-		if (($target_item['deleted']) && (($target_item['uri'] === $target_item['parent-uri']) || $followup)) {
-			// top-level retraction
-			logger('ActivityPub retract: ' . $loc);
-//			ActivityPub::sendRetraction($target_item, $owner, $contact, $public_message);
-			return;
-		} elseif ($cmd == self::RELOCATION) {
-//			ActivityPub::sendAccountMigration($owner, $contact, $owner['uid']);
-			return;
-		} elseif ($followup) {
-			// send comments and likes to owner to relay
-			logger('ActivityPub followup: ' . $loc);
-			$data = ActivityPub::createActivityFromItem($target_item['id']);
-			ActivityPub::transmit($data, $contact['notify'], $owner['uid']);
-//			ActivityPub::sendFollowup($target_item, $owner, $contact, $public_message);
-			return;
-		} elseif ($target_item['uri'] !== $target_item['parent-uri']) {
-			// we are the relay - send comments, likes and relayable_retractions to our conversants
-			logger('ActivityPub relay: ' . $loc);
-			$data = ActivityPub::createActivityFromItem($target_item['id']);
-			ActivityPub::transmit($data, $contact['notify'], $owner['uid']);
-//			ActivityPub::sendRelay($target_item, $owner, $contact, $public_message);
-			return;
-		} elseif ($top_level && !$walltowall) {
-			// currently no workable solution for sending walltowall
-			logger('ActivityPub status: ' . $loc);
-			$data = ActivityPub::createActivityFromItem($target_item['id']);
-			ActivityPub::transmit($data, $contact['notify'], $owner['uid']);
-//			ActivityPub::sendStatus($target_item, $owner, $contact, $public_message);
-			return;
-		}
-
-		logger('Unknown mode ' . $cmd . ' for ' . $loc);
-	}
-
 	/**
 	 * @brief Deliver content via mail
 	 *
diff --git a/src/Worker/Notifier.php b/src/Worker/Notifier.php
index 6a37186186..693a9e343d 100644
--- a/src/Worker/Notifier.php
+++ b/src/Worker/Notifier.php
@@ -16,6 +16,7 @@ use Friendica\Model\Item;
 use Friendica\Model\PushSubscriber;
 use Friendica\Model\User;
 use Friendica\Network\Probe;
+use Friendica\Protocol\ActivityPub;
 use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\OStatus;
 use Friendica\Protocol\Salmon;
@@ -363,9 +364,9 @@ class Notifier
 				}
 
 				// It only makes sense to distribute answers to OStatus messages to Friendica and OStatus - but not Diaspora
-				$networks = [Protocol::ACTIVITYPUB, Protocol::OSTATUS, Protocol::DFRN];
+				$networks = [Protocol::OSTATUS, Protocol::DFRN];
 			} else {
-				$networks = [Protocol::ACTIVITYPUB, Protocol::OSTATUS, Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
+				$networks = [Protocol::OSTATUS, Protocol::DFRN, Protocol::DIASPORA, Protocol::MAIL];
 			}
 		} else {
 			$public_message = false;
@@ -413,6 +414,14 @@ class Notifier
 			}
 		}
 
+		$inboxes = ActivityPub::fetchTargetInboxes($target_item);
+		foreach ($inboxes as $inbox) {
+			logger('Deliver ' . $item_id .' to ' . $inbox .' via ActivityPub', LOGGER_DEBUG);
+
+			Worker::add(['priority' => $a->queue['priority'], 'created' => $a->queue['created'], 'dont_fork' => true],
+					'APDelivery', $cmd, $item_id, $inbox);
+		}
+
 		// send salmon slaps to mentioned remote tags (@foo@example.com) in OStatus posts
 		// They are especially used for notifications to OStatus users that don't follow us.
 		if (!Config::get('system', 'dfrn_only') && count($url_recipients) && ($public_message || $push_notify) && $normal_mode) {
@@ -448,7 +457,7 @@ class Notifier
 				}
 			}
 
-			$condition = ['network' => [Protocol::DFRN, Protocol::ACTIVITYPUB], 'uid' => $owner['uid'], 'blocked' => false,
+			$condition = ['network' => Protocol::DFRN, 'uid' => $owner['uid'], 'blocked' => false,
 				'pending' => false, 'archive' => false, 'rel' => [Contact::FOLLOWER, Contact::FRIEND]];
 
 			$r2 = DBA::toArray(DBA::select('contact', ['id', 'name', 'network'], $condition));