An e-mail alias is an email address that shares a mailbox with a different email address. For instance, you can have email@example.com plus firstname.lastname@example.org and emails sent to both of them will be received in a single mailbox. This option will make it a lot easier and much more convenient to handle many different email addresses since you will need to log in to one single mailbox if you work with webmail as well as configure one single address in a e-mail application on your computer. When you set up an alias, not only will you be able to receive messages, but you will also be able to send out emails from the different addresses and they will share the Outbox, so you will still have all communication in one place. Using aliases is an alternative to working with various email addresses for several purposes or forwarding one e mail address to a different one to be able to control the communication of both in one place.