diff --git a/helpers.py b/helpers.py
index 256e319..ee0c872 100644
--- a/helpers.py
+++ b/helpers.py
@@ -58,6 +58,7 @@ def validate_local_part(local_part: str):
     regex = re.compile(r"^[a-z0-9_.]+$")
     if not re.fullmatch(regex, local_part.lower()):
         raise ValueError(
+            f"Identifier '{local_part}' not allowed! "
             "Only a-z, 0-9 and .-_ are allowed characters, case insensitive."
         )
 
diff --git a/services.py b/services.py
index ec89080..4f299b3 100644
--- a/services.py
+++ b/services.py
@@ -251,7 +251,10 @@ async def reimburse_payment(payment: Payment):
 
 async def update_identifiers(identifiers: List[str], bucket: int):
     for identifier in identifiers:
-        await update_identifier(identifier, bucket)
+        try:
+            await update_identifier(identifier, bucket)
+        except Exception as exc:
+            logger.warning(exc)
 
 
 async def update_identifier(identifier, bucket):
@@ -294,5 +297,9 @@ async def refresh_bucket(
     resp.raise_for_status()
 
     for identifier in resp.text.split("\n"):
-        identifier_name = identifier.split(".")[0]
-        await update_identifier(identifier_name, bucket)
+        try:
+            identifier_name = identifier.split(".")[0]
+            await update_identifier(identifier_name, bucket)
+            await update_identifier(identifier, bucket)
+        except Exception as exc:
+            logger.warning(exc)