A catch-all e-mailbox is one that collects all the emails sent to invalid email addresses. For example, if your email address is info@domain.com, but somebody miswrites it and sends an email message to inof@domain.com, it will still be received in the catch-all mailbox that you have configured. Just one mailbox per domain can have this feature enabled and thus you’ll never miss messages because the other side has an outdated email address or has made a spelling mistake. The negative aspect of using a catch-all mailbox is that you may begin receiving plenty of junk email messages, but this problem can be fixed using an anti-spam filtering solution. It is also crucial to know that a mailbox with an activated catch-all functionality cannot forward inbound messages to a 3rd-party email address.