diff --git a/plugins/ActivityPub/ActivityPubPlugin.php b/plugins/ActivityPub/ActivityPubPlugin.php
index aaa847406e..ed666a3187 100644
--- a/plugins/ActivityPub/ActivityPubPlugin.php
+++ b/plugins/ActivityPub/ActivityPubPlugin.php
@@ -624,33 +624,32 @@ class ActivityPubPlugin extends Plugin
         }
 
         $other = [];
+
         try {
             $other[] = Activitypub_profile::from_profile($notice->getProfile());
         } catch (Exception $e) {
             // Local user can be ignored
         }
-        foreach ($notice->getAttentionProfiles() as $to_profile) {
-            try {
-                $other[] = Activitypub_profile::from_profile($to_profile);
-            } catch (Exception $e) {
-                // Local user can be ignored
-            }
-        }
+
+        $other = array_merge($other,
+                             Activitypub_profile::from_profile_collection(
+                                 $notice->getAttentionProfiles()
+                             ));
+
         if ($notice->reply_to) {
             try {
-                $other[] = Activitypub_profile::from_profile($notice->getParent()->getProfile());
-            } catch (Exception $e) {
-                // Local user can be ignored
-            }
-            try {
-                $mentions = $notice->getParent()->getAttentionProfiles();
-                foreach ($mentions as $to_profile) {
-                    try {
-                        $other[] = Activitypub_profile::from_profile($to_profile);
-                    } catch (Exception $e) {
-                        // Local user can be ignored
-                    }
+                $parent_notice = $notice->getParent();
+
+                try {
+                    $other[] = Activitypub_profile::from_profile($parent_notice->getProfile());
+                } catch (Exception $e) {
+                    // Local user can be ignored
                 }
+
+                $other = array_merge($other,
+                                     Activitypub_profile::from_profile_collection(
+                                         $parent_notice->getAttentionProfiles()
+                                     ));
             } catch (NoParentNoticeException $e) {
                 // This is not a reply to something (has no parent)
             } catch (NoResultException $e) {
@@ -660,7 +659,6 @@ class ActivityPubPlugin extends Plugin
         }
 
         $postman = new Activitypub_postman($profile, $other);
-
         $postman->like($notice);
 
         return true;
@@ -685,33 +683,32 @@ class ActivityPubPlugin extends Plugin
         }
 
         $other = [];
+
         try {
             $other[] = Activitypub_profile::from_profile($notice->getProfile());
         } catch (Exception $e) {
             // Local user can be ignored
         }
-        foreach ($notice->getAttentionProfiles() as $to_profile) {
-            try {
-                $other[] = Activitypub_profile::from_profile($to_profile);
-            } catch (Exception $e) {
-                // Local user can be ignored
-            }
-        }
+
+        $other = array_merge($other,
+                             Activitypub_profile::from_profile_collection(
+                                 $notice->getAttentionProfiles()
+                             ));
+
         if ($notice->reply_to) {
             try {
-                $other[] = Activitypub_profile::from_profile($notice->getParent()->getProfile());
-            } catch (Exception $e) {
-                // Local user can be ignored
-            }
-            try {
-                $mentions = $notice->getParent()->getAttentionProfiles();
-                foreach ($mentions as $to_profile) {
-                    try {
-                        $other[] = Activitypub_profile::from_profile($to_profile);
-                    } catch (Exception $e) {
-                        // Local user can be ignored
-                    }
+                $parent_notice = $notice->getParent();
+
+                try {
+                    $other[] = Activitypub_profile::from_profile($parent_notice->getProfile());
+                } catch (Exception $e) {
+                    // Local user can be ignored
                 }
+
+                $other = array_merge($other,
+                                     Activitypub_profile::from_profile_collection(
+                                         $parent_notice->getAttentionProfiles()
+                                     ));
             } catch (NoParentNoticeException $e) {
                 // This is not a reply to something (has no parent)
             } catch (NoResultException $e) {
@@ -721,7 +718,6 @@ class ActivityPubPlugin extends Plugin
         }
 
         $postman = new Activitypub_postman($profile, $other);
-
         $postman->undo_like($notice);
 
         return true;
diff --git a/plugins/ActivityPub/lib/postman.php b/plugins/ActivityPub/lib/postman.php
index f11ab40454..8bab477022 100644
--- a/plugins/ActivityPub/lib/postman.php
+++ b/plugins/ActivityPub/lib/postman.php
@@ -215,12 +215,23 @@ class Activitypub_postman
     {
         $data = Activitypub_like::like_to_array(
             ActivityPubPlugin::actor_uri($this->actor),
-            $notice->getUrl()
+            Activitypub_notice::getUrl($notice)
                 );
         $data = json_encode($data, JSON_UNESCAPED_SLASHES);
 
         foreach ($this->to_inbox() as $inbox) {
-            $this->send($data, $inbox);
+            $res = $this->send($data, $inbox);
+
+            // accummulate errors for later use, if needed
+            if (!($res->getStatus() == 200 || $res->getStatus() == 202 || $res->getStatus() == 409)) {
+                $res_body = json_decode($res->getBody(), true);
+                $errors[] = isset($res_body[0]['error']) ?
+                          $res_body[0]['error'] : "An unknown error occurred.";
+            }
+        }
+
+        if (!empty($errors)) {
+            common_log(LOG_ERR, sizeof($errors) . " instance/s failed to handle the like activity!");
         }
     }
 
@@ -238,13 +249,24 @@ class Activitypub_postman
         $data = Activitypub_undo::undo_to_array(
             Activitypub_like::like_to_array(
                 ActivityPubPlugin::actor_uri($this->actor),
-                $notice->getUrl()
+                Activitypub_notice::getUrl($notice)
                          )
                 );
         $data = json_encode($data, JSON_UNESCAPED_SLASHES);
 
         foreach ($this->to_inbox() as $inbox) {
-            $this->send($data, $inbox);
+            $res = $this->send($data, $inbox);
+
+            // accummulate errors for later use, if needed
+            if (!($res->getStatus() == 200 || $res->getStatus() == 202 || $res->getStatus() == 409)) {
+                $res_body = json_decode($res->getBody(), true);
+                $errors[] = isset($res_body[0]['error']) ?
+                          $res_body[0]['error'] : "An unknown error occurred.";
+            }
+        }
+
+        if (!empty($errors)) {
+            common_log(LOG_ERR, sizeof($errors) . " instance/s failed to handle the undo-like activity!");
         }
     }
 
@@ -267,7 +289,18 @@ class Activitypub_postman
         $data = json_encode($data, JSON_UNESCAPED_SLASHES);
 
         foreach ($this->to_inbox() as $inbox) {
-            $this->send($data, $inbox);
+            $res = $this->send($data, $inbox);
+
+            // accummulate errors for later use, if needed
+            if (!($res->getStatus() == 200 || $res->getStatus() == 202 || $res->getStatus() == 409)) {
+                $res_body = json_decode($res->getBody(), true);
+                $errors[] = isset($res_body[0]['error']) ?
+                          $res_body[0]['error'] : "An unknown error occurred.";
+            }
+        }
+
+        if (!empty($errors)) {
+            common_log(LOG_ERR, sizeof($errors) . " instance/s failed to handle the create-note activity!");
         }
     }
 
@@ -288,7 +321,18 @@ class Activitypub_postman
         $data = json_encode($data, JSON_UNESCAPED_SLASHES);
 
         foreach ($this->to_inbox() as $inbox) {
-            $this->send($data, $inbox);
+            $res = $this->send($data, $inbox);
+
+            // accummulate errors for later use, if needed
+            if (!($res->getStatus() == 200 || $res->getStatus() == 202 || $res->getStatus() == 409)) {
+                $res_body = json_decode($res->getBody(), true);
+                $errors[] = isset($res_body[0]['error']) ?
+                          $res_body[0]['error'] : "An unknown error occurred.";
+            }
+        }
+
+        if (!empty($errors)) {
+            common_log(LOG_ERR, sizeof($errors) . " instance/s failed to handle the announce activity!");
         }
     }
 
@@ -312,13 +356,10 @@ class Activitypub_postman
         $data = json_encode($data, JSON_UNESCAPED_SLASHES);
         foreach ($this->to_inbox() as $inbox) {
             $res = $this->send($data, $inbox);
-            if (!$res->getStatus() == 200) {
+            if (!($res->getStatus() == 200 || $res->getStatus() == 202 || $res->getStatus() == 409)) {
                 $res_body = json_decode($res->getBody(), true);
-                if (isset($res_body[0]['error'])) {
-                    $errors[] = ($res_body[0]['error']);
-                    continue;
-                }
-                $errors[] = ("An unknown error occurred.");
+                $errors[] = isset($res_body[0]['error']) ?
+                          $res_body[0]['error'] : "An unknown error occurred.";
             }
         }
         if (!empty($errors)) {