Riposte solution
The mailbox is currently in use (locked by another session). This means the server is preventing simultaneous access for certain operations. Your best approach is to wait and retry the operation after a short delay. Riposte will typically handle mailbox locks by retrying automatically, but if you see this often, consider not issuing simultaneous commands on the same mailbox from multiple clients.
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]