Riposte solution
The server is indicating support for the IMAP ANNOTATE/ANNOTATIONS extension. This is just a capability advertisement and not an error. No action is required unless your application intends to use message annotations. Riposte currently focuses on core email sync; you can safely ignore this notification.
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]