An email alias is actually an email that shares a mailbox with a completely different email address. For example, you could have email@example.com and firstname.lastname@example.org and e-mails sent to either one of them will be received in one and the same mailbox. This option will make it less complicated and much more convenient to control many different e-mail addresses as you will need to log in just one mailbox if you are using webmail or configure a single e-mail address in a e-mail app on your computer. When you set up an alias, you will not only be able to receive messages, but you'll also be able to send email messages from the various addresses and they'll share the Outbox, so you will have all communication in a single place. Implementing aliases is surely an alternative option to working with various email addresses for a variety of purposes or forwarding a single e-mail address to another so that you can control the communication of both in one location.