Riposte solution
The server is indicating support for the IMAP ANNOTATE/ANNOTATIONS extension. This is just a capability advertisement and not an error. Unless your application plans to use METADATA/ANNOTATION commands, you don't need to do anything. Riposte handles standard email operations, so you can ignore this info.
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]