diff --git a/app/Http/Controllers/PostMarkController.php b/app/Http/Controllers/PostMarkController.php
index 74067176b919..253a31e72d94 100644
--- a/app/Http/Controllers/PostMarkController.php
+++ b/app/Http/Controllers/PostMarkController.php
@@ -11,6 +11,13 @@
 
 namespace App\Http\Controllers;
 
+use App\Jobs\Util\SystemLogger;
+use App\Libraries\MultiDB;
+use App\Models\CreditInvitation;
+use App\Models\InvoiceInvitation;
+use App\Models\QuoteInvitation;
+use App\Models\RecurringInvoiceInvitation;
+use App\Models\SystemLog;
 use Illuminate\Http\Request;
 
 /**
@@ -18,6 +25,7 @@ use Illuminate\Http\Request;
  */
 class PostMarkController extends BaseController
 {
+    private $invitation;
 
     public function __construct()
     {
@@ -64,14 +72,38 @@ class PostMarkController extends BaseController
         if($request->header('X-API-SECURITY') && $request->header('X-API-SECURITY') == config('postmark.secret'))
         {
 
+            nlog($request->all());
+
+            MultiDB::findAndSetDbByCompanyKey($request->input('Tag'));
+            
+            $this->invitation = $this->discoverInvitation($request->input('MessageID'));
+
+            if($this->invitation){
+                $this->invitation->email_error = $request->input('Details');
+                $this->invitation->save();
+            }
+
+            switch ($request->input('RecordType')) 
+            {
+                case 'Delivery':
+                    return $this->processDelivery($request);
+                case 'Bounce':
+                    return $this->processBounce($request);
+                case 'SpamComplaint':
+                    return $this->processSpamComplaint($request);
+                default:
+                    # code...
+                    break;
+            }
+
+            return response()->json(['message' => 'Success'], 200);
+
         }
 
+        return response()->json(['message' => 'Unauthorized'], 403);
+
     }
 
-
-
-
-
 // {
 //   "RecordType": "Delivery",
 //   "ServerID": 23,
@@ -88,7 +120,7 @@ class PostMarkController extends BaseController
 // }
     private function processDelivery($request)
     {
-
+        SystemLogger::dispatch($request->all(), SystemLog::CATEGORY_MAIL, SystemLog::EVENT_MAIL_DELIVERY, SystemLog::TYPE_WEBHOOK_RESPONSE, $this->invitation->contact->client);
     }
 
 // {
@@ -119,7 +151,7 @@ class PostMarkController extends BaseController
 
     private function processBounce($request)
     {
-
+        SystemLogger::dispatch($request->all(), SystemLog::CATEGORY_MAIL, SystemLog::EVENT_MAIL_BOUNCED, SystemLog::TYPE_WEBHOOK_RESPONSE, $this->invitation->contact->client);
     }
 
 // {
@@ -149,8 +181,22 @@ class PostMarkController extends BaseController
 // }
     private function processSpamComplaint($request)
     {
-
+        SystemLogger::dispatch($request->all(), SystemLog::CATEGORY_MAIL, SystemLog::EVENT_MAIL_SPAM_COMPLAINT, SystemLog::TYPE_WEBHOOK_RESPONSE, $this->invitation->contact->client);
     }
 
+    private function discoverInvitation($message_id)
+    {
+        $invitation = false;
 
+        if($invitation = InvoiceInvitation::whereRaw('BINARY `message_id`= ?', [$message_id])->first())
+            return $invitation;
+        elseif($invitation = QuoteInvitation::whereRaw('BINARY `message_id`= ?', [$message_id])->first())
+            return $invitation;
+        elseif($invitation = RecurringInvoiceInvitation::whereRaw('BINARY `message_id`= ?', [$message_id])->first())
+            return $invitation;
+        elseif($invitation = CreditInvitation::whereRaw('BINARY `message_id`= ?', [$message_id])->first())
+            return $invitation;
+        else
+            return $invitation;
+    }
 }
diff --git a/app/Models/SystemLog.php b/app/Models/SystemLog.php
index 335c530a271a..816846ba255f 100644
--- a/app/Models/SystemLog.php
+++ b/app/Models/SystemLog.php
@@ -47,6 +47,9 @@ class SystemLog extends Model
 
     const EVENT_MAIL_SEND = 30;
     const EVENT_MAIL_RETRY_QUEUE = 31; //we use this to queue emails that are spooled and not sent due to the email queue quota being exceeded.
+    const EVENT_MAIL_BOUNCED = 32;
+    const EVENT_MAIL_SPAM_COMPLAINT = 33;
+    const EVENT_MAIL_DELIVERY = 34;
 
     const EVENT_WEBHOOK_RESPONSE = 40;
     const EVENT_PDF_RESPONSE = 50;