- SASL Authentication
- Include code to fetch an OAuth2 token?
- IMAP4 Client
- Consolidate MessageFlagsChanged, MessageLabelsChanged, and ModSeqChanged events into a single event?
- Extensions:
- BINARY
- CATENATE
- LIST-EXTENDED (Note: partially implemented already)
- CONVERT (Note: none of the mainstream IMAP servers seem to support this)
- MULTISEARCH (Note: none of the mainstream IMAP servers seem to support this)
- UNAUTHENTICATE
- MessageThreader
- Fix UniqueId property to be just a UniqueId instead of Nullable.
- IMailFolder
- Modify Append() methods to simply return UniqueId instead of Nullable?
- Modify CopyTo/MoveTo() methods to also return UniqueId instead of Nullable?
- Maildir
- Thunderbird-style mbox folder trees?