An e-mail alias is actually an e-mail address that shares a mailbox with a different e-mail address. For example, you can have info@domain.com and support@domain.com and emails sent to both of them will be received in just one mailbox. This option will make it easier and more convenient to manage numerous addresses as you will need to log in to just one mailbox if you work with webmail as well as configure one e-mail address in a e-mail client on your desktop. If you create an alias, you will not only have the ability to get e-mails, but you will also be able to send out e-mails from the different addresses and they'll share the Outbox, so you will still have all communication in a single place. Working with aliases can be an alternative to working with various mailboxes for different purposes or forwarding a single e-mail address to a different one in order to control the communication of both in a single place.