- server usage
- Used in announcement channels to signal an external email or newsletter was sent to server members.
- reaction use
- Reacted to posts to signal 'message received' or 'noted.'
- emote mapping
- Maps to custom server emotes like ':incomingmail:' used in notification or admin channels.
- gaming context
- Used when a game sends an important in-game message or when a gaming newsletter drops.
- role meaning
- Sometimes assigned as a role icon for members subscribed to a server's external mailing list.