Do you mean ESP or ISP? Relying on an ISP email forwarder doesn't work because if I move and cancel my service, I lose all these forwarders. What ESP do you re

Do you mean ESP or ISP? Relying on an ISP email forwarder doesn't work because if I move and cancel my service, I lose all these forwarders. What ESP do you recommend for unlimited (or large numbers of) aliases indistinguishable from individual email addresses (such as ycombinator4853@foo.com facebook843983@foo.com but not john+ycombinator@gmail.com john+facebook@gmail.com)? Edit: fastmail's standard $50/yr plan offers 600 aliases. This might be good enough. I've created online accounts at 371 different services over the last 20 years.