An e-mail alias is actually an email address that shares a mailbox with a completely different email address. For instance, you can have firstname.lastname@example.org as well as email@example.com and emails sent to both of them will be received in one mailbox. This option will make it a lot easier and more convenient to manage various email addresses because you will need to log into just one mailbox if you use webmail or create one single e-mail address in an e-mail application on your desktop. When you set up an alias, not only will you have the ability to receive messages, but you will also be able to send out emails from the different addresses and they'll share the Outbox, so you will have all communication in one location. Making use of aliases can be a substitute for using various e-mail addresses for different purposes or forwarding a single e mail address to a new one in order to manage the e-mails of both in one place.