An alias address (also named proxy address) lets a user receive an email that’s sent to a different email address but is not a mailbox.
Let’s imagine it such as a predefined redirect.
Email sent to an email alias arrives in the user’s Inbox.
WHEN & WHY USE AN ALIAS
Adding email aliases to a user is helpful when:
You want to keep safe your real identity and prefer to show your real email address.
You manage a company organization where the same people have in charge different roles (staff, sales, pre-sales, sales-info).
A user changes their name, and you want to add an email alias with their new name while maintaining their primary email address.
Can I set up an alias to email to multiple users?
Yes you can able to create a single entry point for a whole team (e.g. Sales@mydomain.com)
The alias remains one the more flexible email features used to create the relationship between roles/functions and real user and it could be combined with further benefits with other features such us the Dropbox attachment management.