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Re:Cierge – passwordless authentication by phlo on Friday January 12, 2018 @06:46AM (#16132183)
Not OP, but I do the same thing using wildcard addresses on a domain I own. I might use [email protected] for Hacker News, [email protected] for Amazon and so on.

Foregoing the custom domain, some email providers also let you add tags to your address (e.g. [email protected]). I'm aware of some people who use that functionality to have unique email addresses for each service.

Re:Cierge – passwordless authentication by piotrkubisa on Friday January 12, 2018 @07:13AM (#16132285)
I also use this method. Thanks to it I usually can check if e-mail was automated and also I am not disturbed by e-mails with social media notification, shop promos or marketing spam during work. Also some e-mail providers allow to create many e-mail aliases which shares the same inbox.