Open Mailbox With Lowered Flag on Telegram

What it signals here

sticker mapping

Maps to 'empty' or 'waiting' sticker packs, often used alongside sad or bored character stickers.

channel use

Placed in channel descriptions or pinned messages to indicate no new announcements are pending.

group meaning

Used in group chats to signal that a conversation has gone cold or no one has responded to a question.

bot context

Could be returned by notification bots to indicate an empty queue or no pending tasks.

See it elsewhere