A catch-all email mailbox is one that gathers all the messages sent to inactive addresses. For instance, if your email address is email@example.com, but somebody miswrites it and sends an email message to firstname.lastname@example.org, it will still be received in the catch-all mailbox that you have configured. Just one single mailbox per domain name can have this feature activated and thus you will never miss emails because the other party has an obsolete address or has made a typo. The disadvantage of configuring a catch-all mailbox is that you may begin receiving lots of spam messages, but this problem can be resolved by using anti-spam filtering software. It’s also crucial to know that a mailbox with an active catch-all feature cannot redirect incoming emails to a 3rd-party mailbox.