If you have a Gmail account, you have unlimited addresses and you may not even know it. There are two ways to achieve this, adding a phrase (“plus-addressing”) and adding a period to your address.
This is not a Gmail specific trick, some other email clients can create unlimited addresses as well.
Let’s say that your Gmail address is firstname.lastname@example.org and you want to automatically label all work emails. This can be done simply by adding a plus sign and a phrase to make it email@example.com. Any email that is sent to firstname.lastname@example.org will go to your email@example.com account.
Let’s again say your Gmail address is firstname.lastname@example.org. You can put a period in any spot before the “@” sign and the email will still be delivered to your account. For example email@example.com and firstname.lastname@example.org will both work.