All Gmail Users Are Given Two Separate Email Addresses

You probably know how to create multiple email aliases in Gmail by adding the plus symbol and dots to your Gmail username but there’s something more interesting.

When you create a Gmail account, you actually get two email addresses - one is the regular @gmail.com while the second email address has @googlemail.com in the domain.

Link:
http://.../gmail-email-alias-two-separate-gmail-address/