When were your mail mailed out?
You can expect that your mail will be mailed out the same day which you place it in a mailbox if you do so in the morning, or the following business day if you place it in the mailbox after the carrier has already visited the mailbox that day. The postal service picks up from most mailboxes Monday through Saturday. To determine when a letter was mailed, if you are in receipt of the letter, you can examine the postmark date on it. It shows when the postal service took possession of the letter.