diff --git a/database.sql b/database.sql
index b37036762e..3ca42e3377 100644
--- a/database.sql
+++ b/database.sql
@@ -1,6 +1,6 @@
 -- ------------------------------------------
 -- Friendica 2020.12-dev (Red Hot Poker)
--- DB_UPDATE_VERSION 1378
+-- DB_UPDATE_VERSION 1379
 -- ------------------------------------------
 
 
@@ -332,6 +332,7 @@ CREATE TABLE IF NOT EXISTS `apcontact` (
 	 INDEX `alias` (`alias`(190)),
 	 INDEX `followers` (`followers`(190)),
 	 INDEX `baseurl` (`baseurl`(190)),
+	 INDEX `sharedinbox` (`sharedinbox`(190)),
 	 INDEX `gsid` (`gsid`),
 	FOREIGN KEY (`gsid`) REFERENCES `gserver` (`id`) ON UPDATE RESTRICT ON DELETE RESTRICT
 ) DEFAULT COLLATE utf8mb4_general_ci COMMENT='ActivityPub compatible contacts - used in the ActivityPub implementation';
@@ -1057,7 +1058,7 @@ CREATE TABLE IF NOT EXISTS `photo` (
 	 INDEX `uid_album_scale_created` (`uid`,`album`(32),`scale`,`created`),
 	 INDEX `uid_album_resource-id_created` (`uid`,`album`(32),`resource-id`,`created`),
 	 INDEX `resource-id` (`resource-id`),
-	FOREIGN KEY (`uid`) REFERENCES `user` (`uid`) ON UPDATE RESTRICT ON DELETE CASCADE,
+	FOREIGN KEY (`uid`) REFERENCES `user` (`uid`) ON UPDATE RESTRICT ON DELETE RESTRICT,
 	FOREIGN KEY (`contact-id`) REFERENCES `contact` (`id`) ON UPDATE RESTRICT ON DELETE RESTRICT
 ) DEFAULT COLLATE utf8mb4_general_ci COMMENT='photo storage';
 
diff --git a/src/Model/APContact.php b/src/Model/APContact.php
index 6a8e5b3ae1..37faf240ce 100644
--- a/src/Model/APContact.php
+++ b/src/Model/APContact.php
@@ -32,6 +32,7 @@ use Friendica\Protocol\ActivityNamespace;
 use Friendica\Protocol\ActivityPub;
 use Friendica\Util\Crypto;
 use Friendica\Util\DateTimeFormat;
+use Friendica\Util\HTTPSignature;
 use Friendica\Util\JsonLD;
 use Friendica\Util\Network;
 
@@ -148,6 +149,7 @@ class APContact
 
 		$data = ActivityPub::fetchContent($url);
 		if (empty($data)) {
+			self::markForArchival($fetched_contact ?: []);
 			return $fetched_contact;
 		}
 
@@ -350,10 +352,54 @@ class APContact
 		return $apcontact;
 	}
 
+	/**
+	 * Mark the given AP Contact as "to archive"
+	 *
+	 * @param array $apcontact
+	 * @return void
+	 */
+	public static function markForArchival(array $apcontact)
+	{
+		if (!empty($apcontact['inbox'])) {
+			Logger::info('Set inbox status to failure', ['inbox' => $apcontact['inbox']]);
+			HTTPSignature::setInboxStatus($apcontact['inbox'], false);
+		}
+
+		if (!empty($apcontact['sharedinbox'])) {
+			// Check if there are any available inboxes
+			$available = DBA::exists('apcontact', ["`sharedinbox` = ? AnD `inbox` IN (SELECT `url` FROM `inbox-status` WHERE `success` > `failure`)",
+				$apcontact['sharedinbox']]);
+			if (!$available) {
+				// If all known personal inboxes are failing then set their shared inbox to failure as well
+				Logger::info('Set shared inbox status to failure', ['sharedinbox' => $apcontact['sharedinbox']]);
+				HTTPSignature::setInboxStatus($apcontact['sharedinbox'], false, true);
+			}
+		}
+	}
+
+	/**
+	 * Unmark the given AP Contact as "to archive"
+	 *
+	 * @param array $apcontact
+	 * @return void
+	 */
+	public static function unmarkForArchival(array $apcontact)
+	{
+		if (!empty($apcontact['inbox'])) {
+			Logger::info('Set inbox status to success', ['inbox' => $apcontact['inbox']]);
+			HTTPSignature::setInboxStatus($apcontact['inbox'], true);
+		}
+		if (!empty($apcontact['sharedinbox'])) {
+			Logger::info('Set shared inbox status to success', ['sharedinbox' => $apcontact['sharedinbox']]);
+			HTTPSignature::setInboxStatus($apcontact['sharedinbox'], true, true);
+		}
+	}
+
 	/**
 	 * Unarchive inboxes
 	 *
-	 * @param string $url inbox url
+	 * @param string  $url    inbox url
+	 * @param boolean $shared Shared Inbox
 	 */
 	private static function unarchiveInbox($url, $shared)
 	{
@@ -361,15 +407,6 @@ class APContact
 			return;
 		}
 
-		$now = DateTimeFormat::utcNow();
-
-		$fields = ['archive' => false, 'success' => $now, 'shared' => $shared];
-
-		if (!DBA::exists('inbox-status', ['url' => $url])) {
-			$fields = array_merge($fields, ['url' => $url, 'created' => $now]);
-			DBA::replace('inbox-status', $fields);
-		} else {
-			DBA::update('inbox-status', $fields, ['url' => $url]);
-		}
+		HTTPSignature::setInboxStatus($url, true, $shared);
 	}
 }
diff --git a/src/Protocol/ActivityPub/Receiver.php b/src/Protocol/ActivityPub/Receiver.php
index 3c0f4862e6..d1426ff5ae 100644
--- a/src/Protocol/ActivityPub/Receiver.php
+++ b/src/Protocol/ActivityPub/Receiver.php
@@ -104,6 +104,8 @@ class Receiver
 			return;
 		}
 
+		APContact::unMarkForArchival($apcontact);
+
 		$http_signer = HTTPSignature::getSigner($body, $header);
 		if (empty($http_signer)) {
 			Logger::warning('Invalid HTTP signature, message will be discarded.');
@@ -233,6 +235,7 @@ class Receiver
 
 		$profile = APContact::getByURL($object_id);
 		if (!empty($profile['type'])) {
+			APContact::unMarkForArchival($profile);
 			return 'as:' . $profile['type'];
 		}
 
diff --git a/src/Protocol/ActivityPub/Transmitter.php b/src/Protocol/ActivityPub/Transmitter.php
index 4c2977ec7f..7f5f51c38a 100644
--- a/src/Protocol/ActivityPub/Transmitter.php
+++ b/src/Protocol/ActivityPub/Transmitter.php
@@ -670,7 +670,7 @@ class Transmitter
 	 *
 	 * @return boolean "true" if inbox is archived
 	 */
-	private static function archivedInbox($url)
+	public static function archivedInbox($url)
 	{
 		return DBA::exists('inbox-status', ['url' => $url, 'archive' => true]);
 	}
diff --git a/src/Util/HTTPSignature.php b/src/Util/HTTPSignature.php
index c5507adf3f..5b7bb02a3e 100644
--- a/src/Util/HTTPSignature.php
+++ b/src/Util/HTTPSignature.php
@@ -314,14 +314,15 @@ class HTTPSignature
 	 *
 	 * @param string  $url     The URL of the inbox
 	 * @param boolean $success Transmission status
+	 * @param boolean $shared  The inbox is a shared inbox
 	 */
-	static private function setInboxStatus($url, $success)
+	static public function setInboxStatus($url, $success, $shared = false)
 	{
 		$now = DateTimeFormat::utcNow();
 
 		$status = DBA::selectFirst('inbox-status', [], ['url' => $url]);
 		if (!DBA::isResult($status)) {
-			DBA::insert('inbox-status', ['url' => $url, 'created' => $now]);
+			DBA::insert('inbox-status', ['url' => $url, 'created' => $now, 'shared' => $shared]);
 			$status = DBA::selectFirst('inbox-status', [], ['url' => $url]);
 		}
 
diff --git a/src/Worker/APDelivery.php b/src/Worker/APDelivery.php
index 92767a1058..a25977372a 100644
--- a/src/Worker/APDelivery.php
+++ b/src/Worker/APDelivery.php
@@ -42,7 +42,16 @@ class APDelivery
 	 */
 	public static function execute($cmd, $target_id, $inbox, $uid)
 	{
-		Logger::log('Invoked: ' . $cmd . ': ' . $target_id . ' to ' . $inbox, Logger::DEBUG);
+		if (ActivityPub\Transmitter::archivedInbox($inbox)) {
+			Logger::info('Inbox is archived', ['cmd' => $cmd, 'inbox' => $inbox, 'id' => $target_id, 'uid' => $uid]);
+			if (in_array($cmd, [Delivery::POST])) {
+				$item = Item::selectFirst(['uri-id'], ['id' => $target_id]);
+				Post\DeliveryData::incrementQueueFailed($item['uri-id'] ?? 0);
+			}
+			return;
+		}
+
+		Logger::info('Invoked', ['cmd' => $cmd, 'inbox' => $inbox, 'id' => $target_id, 'uid' => $uid]);
 
 		$success = true;
 
diff --git a/src/Worker/Delivery.php b/src/Worker/Delivery.php
index 44041957fc..8e49ee4715 100644
--- a/src/Worker/Delivery.php
+++ b/src/Worker/Delivery.php
@@ -193,9 +193,9 @@ class Delivery
 			return;
 		}
 
-		// We don't deliver our items to blocked or pending contacts, and not to ourselves either
+		// We don't deliver our items to blocked, archived or pending contacts, and not to ourselves either
 		$contact = DBA::selectFirst('contact', [],
-			['id' => $contact_id, 'blocked' => false, 'pending' => false, 'self' => false]
+			['id' => $contact_id, 'archive' => false, 'blocked' => false, 'pending' => false, 'self' => false]
 		);
 		if (!DBA::isResult($contact)) {
 			self::setFailedQueue($cmd, $target_item);
diff --git a/static/dbstructure.config.php b/static/dbstructure.config.php
index caec82625f..3239c8e7ca 100644
--- a/static/dbstructure.config.php
+++ b/static/dbstructure.config.php
@@ -55,7 +55,7 @@
 use Friendica\Database\DBA;
 
 if (!defined('DB_UPDATE_VERSION')) {
-	define('DB_UPDATE_VERSION', 1378);
+	define('DB_UPDATE_VERSION', 1379);
 }
 
 return [
@@ -395,6 +395,7 @@ return [
 			"alias" => ["alias(190)"],
 			"followers" => ["followers(190)"],
 			"baseurl" => ["baseurl(190)"],
+			"sharedinbox" => ["sharedinbox(190)"],
 			"gsid" => ["gsid"]
 		]
 	],
@@ -1081,7 +1082,7 @@ return [
 		"comment" => "photo storage",
 		"fields" => [
 			"id" => ["type" => "int unsigned", "not null" => "1", "extra" => "auto_increment", "primary" => "1", "comment" => "sequential ID"],
-			"uid" => ["type" => "mediumint unsigned", "not null" => "1", "default" => "0", "foreign" => ["user" => "uid"], "comment" => "Owner User id"],
+			"uid" => ["type" => "mediumint unsigned", "not null" => "1", "default" => "0", "foreign" => ["user" => "uid", "on delete" => "restrict"], "comment" => "Owner User id"],
 			"contact-id" => ["type" => "int unsigned", "not null" => "1", "default" => "0", "foreign" => ["contact" => "id", "on delete" => "restrict"], "comment" => "contact.id"],
 			"guid" => ["type" => "char(16)", "not null" => "1", "default" => "", "comment" => "A unique identifier for this photo"],
 			"resource-id" => ["type" => "char(32)", "not null" => "1", "default" => "", "comment" => ""],