How to Use Plus Addressing in Gmail: 6 Steps (with Pictures) - wikiHow
https://www.wikihow.com/Use-Plus-Addressing-in-Gmail
Steps Get a Gmail account. Go to the external site you want to sign up for e.g. Facebook, Myspace, eBay or Amazon. When asked to enter your e-mail address, add a suffix of a plus sign and the name of the service. Add this to the end... Create a label in Gmail. Create a filter and enter the same e-mail address you just used in the "To:" field.
Get a Gmail account.
Go to the external site you want to sign up for e.g. Facebook, Myspace, eBay or Amazon.
When asked to enter your e-mail address, add a suffix of a plus sign and the name of the service. Add this to the end...
Create a label in Gmail.
Create a filter and enter the same e-mail address you just used in the "To:" field.
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