A catch-all e-mailbox is one that collects all the emails sent to non-existent email addresses. For instance, if your email 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one mailbox per domain can have this feature enabled and thus you’ll never miss emails because the other side has an out-of-date address or has made a typographical error. The negative aspect of using a catch-all mailbox is that you may start receiving plenty of unsolicited messages, but this issue can be fixed using anti-spam filtering software. It’s also crucial to bear in mind that a mailbox with an activated catch-all functionality cannot redirect incoming emails to a third-party mailbox.