Some of you may already be aware, but gmail has a neat feature that allows you to use ‘n’ e-mail addresses to be delivered to the same mailbox.
It allows you to use ‘any email@example.com’ to send e-mails to ‘firstname.lastname@example.org’. (email@example.com, firstname.lastname@example.org etc.)
Further, you can see the full address in the message, so you know that it was original sent to ‘any email@example.com’.
Very useful if you are testing a system that needs to send multiple e-mails to ‘different users’.