An e-mail alias is actually an e-mail that shares a mailbox with a completely different email address. For instance, you could have email@example.com plus firstname.lastname@example.org and e-mails sent to either one of them will be received in just one mailbox. This option will make it less difficult and more convenient to control numerous addresses since you will have to log in to only one mailbox if you are using webmail as well as configure one single address in an e-mail client on your computer. When you create an alias, you won't just be able to get emails, but you will also be able to send out email messages from the various addresses and they will share the Outbox, so you'll have all communication in one location. Making use of aliases can be an alternative to working with different e-mail addresses for different purposes or forwarding a single e mail address to another one to be able to handle the emails of both in one place.