I’m having some positive experiences with Firefox Relay and Apple’s Hide My Email services. They are pretty similar but Relay works in any browsers that can use its extensions and HME works on iOS devices which use Safari. Relay also supports phone masking where they give you a single proxy phone number you can use for signing up for online forms.
Negatives so far:
1. Relay costs money for continued use
2. Not every site supports a Relay email with the default domain or phone number (it is a VOIP number I think)
3. I am not sure what will happen to my HME emails if I ever stop using iOS / iCloud
4. My single Relay support request was not responded to in a useful way
5. I still have a ton of accounts that predate my usage of these services
6. Sometimes when a service is really important or I am dealing with a human being I will just give my direct info to try to make sure things work smoothly.
I bet a Relay or HME compromise would be an interesting thing from a hacker’s perspective. But I still like the services.