A catch-all email mailbox is one that gathers all the email messages sent to nonexistent addresses. For example, if your email address is firstname.lastname@example.org, but somebody mistypes it and sends an email message to email@example.com, it will still be received in the catch-all mailbox that you have set up. Only one mailbox per domain can have this feature enabled and in this way you will never miss messages because the other side has an obsolete email address or has made a mistake. The downside of configuring a catch-all mailbox is that you may start receiving plenty of unsolicited email messages, but this issue can be resolved using anti-spam filtering software. It’s also essential to bear in mind that a mailbox with an activated catch-all feature cannot forward inbound emails to a 3rd-party address.