diff --git a/mpcontribs-api/mpcontribs/api/projects/document.py b/mpcontribs-api/mpcontribs/api/projects/document.py
index 7b4ddeed8..6fd439dc4 100644
--- a/mpcontribs-api/mpcontribs/api/projects/document.py
+++ b/mpcontribs-api/mpcontribs/api/projects/document.py
@@ -117,8 +117,9 @@ def post_save(cls, sender, document, **kwargs):
                 Name=f"mpcontribs_{document.name}",
                 Attributes={"DisplayName": f"MPContribs {document.title}"},
             )
+            endpoint = document.owner.split(":", 1)[1]
             sns_client.subscribe(
-                TopicArn=resp["TopicArn"], Protocol="email", Endpoint=document.owner
+                TopicArn=resp["TopicArn"], Protocol="email", Endpoint=endpoint
             )
         else:
             set_keys = document._delta()[0].keys()