If you have an email address and you activate forwarding for it, all incoming emails will be sent to a third-party mailbox that you pick. The email sender will not be aware of this and he will send the e-mail to the original address. This function is useful in case you have multiple sites, each one with a different e-mail for contact, for example. By forwarding all emails to one particular email address, it will be simpler for you to keep track and not neglect a message because you have overlooked to check on a particular email. In case you manage a company, you’ll be able to use this function to observe the e-mails received by different divisions. An additional advantage is that you'll be able to make use of an official e-mail address for some reasons, let’s say admin@your-domain.com, and you can now get all messages sent to it inside your personal email address. It's also possible to forward messages from one e-mail to multiple ones, in case a number of people needs to be involved with the email communication.