Riposte solution
The server supports special-use mailbox attributes (indicating roles like Inbox, Sent, etc.). This is an informational capability notification. Riposte already recognizes standard folders. No action is required; if anything, you can use this info to map mailboxes to roles, but Riposte likely does that automatically.
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]