We're actively reaching out to maintainers of such lists (see e.g. [1]) to get us removed, and take a number of measures to make that more palatable (see also [1]). And of course Relay is a bit different from services like Mailinator, where email addresses are usually actually single-use: Relay addresses remain active until their owner actively disables them. Possibly in the future it might also be possible to bring your own domain, but I don't think we have any concrete plans for that that we can share.

That said, no solution is perfect, and I expect that there will likely always be situations where you will be forced to fall back to a regular email address.

[1] https://github.com/wesbos/burner-email-providers/pull/339