Open Mailbox With Raised Flag on Telegram

What it signals here

sticker mapping

Maps to sticker packs themed around communication, letters, and retro postal imagery.

channel use

Channel admins use it to announce that newsletters or important messages have been sent out.

group meaning

In group chats, signals that a message has been forwarded to someone or that an inbox has been filled with content.

bot context

Used in bot interfaces to indicate incoming notifications or message queue updates.

See it elsewhere