An email alias may be useful when you need to approve or otherwise administer an SSL certificate. This is often the case because SSL providers often want to send "approval" email messages to one of a few designated email addresses such as:
If you do not have one of these email accounts setup you can create an email alias for one of your existing email accounts.
Office 365 Business Users
If you have a Microsoft Office 365 Business account, the following document describes how to setup the email alias: