Merge pull request #5477 from matrix-org/babolivier/third_party_rules_3pid

Author: anoadragon453

synapse/handlers/room_member.py

@@ -775,6 +775,15 @@ def do_3pid_invite(
             update=True,
         )
 
+        can_invite = yield self.third_party_event_rules.check_threepid_can_be_invited(
+            medium, address, room_id,
+        )
+        if not can_invite:
+            raise SynapseError(
+                403, "This third-party identifier can not be invited in this room",
+                Codes.FORBIDDEN,
+            )
+
         can_invite = yield self.third_party_event_rules.check_threepid_can_be_invited(
             medium, address, room_id,
         )