A catch-all email mailbox is one that captures all the messages sent to nonexistent email addresses. For example, if your address is firstname.lastname@example.org, but someone misspells it and sends an email message to email@example.com, it will still be received in the catch-all mailbox that you have created. Just one mailbox per domain name can have this feature activated and thus you’ll never miss messages because the other side has an outdated address or has made a mistake. The drawback of using a catch-all mailbox is that you may start receiving lots of unsolicited messages, but this problem can be rectified using an anti-spam filtering solution. It is also important to remember that a mailbox with an active catch-all functionality cannot forward inbound emails to a third-party mailbox.