IMAP
> Boxes
  > Messages (ordered by uid)

AETHER
> Conversations
  > (Parsed) Messages (indexed by MessageID)

MONGO
> Box
	> BoxID
	> UIDValidity
	> UIDNext
	> SeqNext
	> ...

> MsgUUID
	> MessageID
	> Box
	> UID

> Participant
	Name
	Image
	Addresses
	...

> Messages
	> MsgUUID
	> Subject
	> Participant[]
	> Time
	> ParsedContent

> Conversations
	> Title
	> Archived
	> LatestMessageTime
	> Participant[]
	> Messages[]

Box
SEQNO / UID / SUBJECT

1 / 1: aaa
2 / 3: bbb
--- 3 / 7: ccc
---
--- 3 / 8: ddd