Somewhere in 1999 I started using unique email addresses for every single service or registration. For example, if I would register with Reddit today, then I wo

Somewhere in 1999 I started using unique email addresses for every single service or registration. For example, if I would register with Reddit today, then I would use 20220825_reddit_registration@example.com. This makes it really easy to filter out spam (and I also know who sold my address). It's also trivial to block unwanted 'subscriptions'. I use Thunderbird and create an identity for every one of these mails that require a reply (most don't) and TB automatically uses the unique address when replying.