Closed Mailbox With Lowered Flag on Telegram

What it signals here

sticker mapping

Maps to 'no messages' or 'silence' sticker packs in lo-fi or minimalist sticker sets.

channel use

Used in channel descriptions that are temporarily inactive or on hiatus.

group meaning

In group chats, signals that the conversation has gone quiet or activity has died down.

bot context

Bots may use this to notify users of no new updates or an empty queue.

See it elsewhere