diff --git a/src/backend/mailbox_manager/utils/dimail.py b/src/backend/mailbox_manager/utils/dimail.py
index 5fc6272..68eb6d4 100644
--- a/src/backend/mailbox_manager/utils/dimail.py
+++ b/src/backend/mailbox_manager/utils/dimail.py
@@ -83,7 +83,7 @@ class DimailAPIClient:
 
         try:
             response = session.post(
-                f"{self.API_URL}/domains/{mailbox['domain']}/mailboxes/{mailbox['local_part']}/",
+                f"{self.API_URL}/domains/{mailbox['domain']}/mailboxes/{mailbox['local_part']}",
                 json=payload,
                 headers=headers,
                 verify=True,