> I used per-account email with alias services and password managers.
For people who want to do this, be sure to get it right. I run a SaaS with a free tier, and I see people register with "fancy+nospam+servicename@gmail.com" addresses. Many of those become undeliverable or are left unread forever because of filtering rules. So when my system sends a warning E-mail that the account will be deleted due to inactivity, it doesn't get read, which leads to suboptimal outcomes for everyone involved.
It was infuriating to me when normal_email+site_name@gmail.com stopped working for registration on some sites.
Fucked up my Costco registration, a variety of other things.
This sort of quasi-pseudonymity is required for basic security/privacy in 2025; It's the only way to get a handle on who's allowed to send you email, since we've never bothered to fix spoofing or impose a cost on spam. I've been trying to use it since Sneakemail was a free service back in the pre-Gmail days.
Many spammers will strip the +xxxx out of the emails anyway to not reveal the source of their data so it doesn't matter too much really.