Riposte solution
The operation is not allowed due to server-defined rules. For example, you might be trying to delete a mailbox that has subfolders while the server prohibits it. To fix, adjust your workflow: you might need to perform additional steps (like remove subfolders first) or simply refrain from that action. In short, respect the server's limitations—no direct API override is possible.
Quick facts
- Provider
- IMAP
- Endpoint / surface
- IMAP Protocol
Why it happens
[Protocol-level condition per RFC/extension]
How to fix it
[Adjust client behavior per RFC semantics; often retry or change command/parameters]