Redirect email means automatically forward all of your incoming email to other account that can be either in the same domain, or any other email address except free email services such as Gmail (Why?).
*Please take note that there is no guarantee that all emails will be forwarded successfully. For more info, please refer to Conditional Email Forwarding and Redirect.
In order to this:
Caveat:
If you decided not to login with this particular account to manage your email later, make sure you uncheck “Keep incoming email” option, so that all incoming email will not stay in your Inbox.
This is to ensure that your mailbox has free spaces.