I bought a single domain @MyEmail.org, and create a new user for each site I sign up with that forwards to my gmail.
1@MyEmail.org, 2@MyEmail.org, 3@MyEmail.org etc...
service1@me.your.domain service1@dad.your.domain
(Instead of me+service1@your.domain)
service2@me.your.domain service2@mom.your.domain
and so on. So, those services have no way of fooling you by tampering with the alias parts.
But of course this isn't easy unless you roll your own mail server.
I bought a single domain @MyEmail.org, and create a new user for each site I sign up with that forwards to my gmail.
1@MyEmail.org, 2@MyEmail.org, 3@MyEmail.org etc...