As an SUU student you automatically get an suumail.net email address, this email also has a .edu alias.
firstname.lastname@example.org is equivalent to
There are some vendors that offer discounts to students with a .edu email address. Amazon.com for instance. When you sign up for an suumail.net email address, you automatically get a .edu address as an alias. So if your SUUMAIL email address is email@example.com, your .edu alias would be firstname.lastname@example.org. In other words, if someone sends and email to email@example.com, it will be delivered to your firstname.lastname@example.org Inbox.