A catch-all e-mailbox is one that captures all the email messages sent to invalid addresses. For instance, if your email address is firstname.lastname@example.org, but someone misspells it and sends an email to email@example.com, it will still be received in the catch-all mailbox that you have created. Just one single mailbox per domain name can have this feature activated and in this way you will never miss emails because the other party has an outdated email address or has made a mistake. The disadvantage of setting up a catch-all mailbox is that you may start receiving a lot of unsolicited emails, but this issue can be solved using an anti-spam protection solution. It’s also important to remember that a mailbox with an activated catch-all functionality cannot forward inbound email messages to a third-party address.