fix async bug in mailadress target event lookup

core/mail/protocol.py

@@ -90,6 +90,15 @@ def find_active_issue_thread(in_reply_to, subject=None):
         return issue, True
 
 
+def find_target_event(address):
+    try:
+        address_map = EventAddress.objects.get(address=address)
+        if address_map.event:
+            return address_map.event
+    except EventAddress.DoesNotExist:
+        pass
+    return None
+
 class LMTPHandler:
     async def handle_RCPT(self, server, session, envelope, address, rcpt_options):
         from core.settings import MAIL_DOMAIN
@@ -142,13 +151,7 @@ class LMTPHandler:
             subject = parsed.get('Subject')
             subject = unescape_and_decode_quoted_printable(subject)
             subject = unescape_and_decode_base64(subject)
-            target_event = None
-            try:
-                address_map = await sync_to_async(EventAddress.objects.get)(address=recipient)
-                if address_map.event:
-                    target_event = address_map.event
-            except EventAddress.DoesNotExist:
-                pass
+            target_event = await sync_to_async(find_target_event)(recipient)
 
             active_issue_thread, new = await sync_to_async(find_active_issue_thread)(header_in_reply_to, subject)
             body_decoded = body.decode('utf-8')