My goal would be for any online service I use to have a unique email address, and for me to be able to log into one mailbox to see/manage the email received from these proxy addresses.
The ultimate goal being increased sandboxing of services and PII that may be leaking between them.
Thank you.
One minor inconvenience I've encountered is that a few services have buggy email validation which prevent such addresses.
[1]: https://gmail.googleblog.com/2008/03/2-hidden-ways-to-get-mo...
You can use your own domain, and set up many aliases (there is a limit though). You can also use example+anythingHere@example.com (but you can also do this with other email providers such as Gmail)...
They also have a long list of their own domains (maybe 20-40, I can't remember) that you can use.
Or you could set up your own server with a catch all email address. https://en.wikipedia.org/wiki/Catch-all
I also used to do be able to do it with migadu when I was hosting with them.
The aliases are routed with a longest-prefix-match sort of algorithm, so you can blacklist specific addresses that have gotten spammy by aliasing them to some inexistent address.
If so I'd use a deterministic algo. Examples:
1) (kind of) irreversible: md5(service-domain)
2) easily reversible (for you): aes(service-domain) with a known key
Make sure you don't have pii in your fakedomain.com.