An opened mailbox with lowered flag emoji📭An open mailbox with a flag raised but with a flag lowered instead of raised. It suggests that the outgoing mail object has been collected but that the mailbox is empty, as in there are no incoming messages or posts.
When Unicode 6.0 was approved in 2010, the Open Mailbox With Lowered Flag was added to Emoji 1.
📭 Empty Mailbox
📭 Empty Mailbox With Lowered Flag
📭 No Mails
📭 Open Mailbox With No Mails
📭 Picked Up Mail
📭 No Pending Mail