IMO use email providers that have that built in. Because if your alias provider goes down, you’re fucked. And considering it’s a much less stable business than an email provider, it’s more likely.

If Gmail goes down in 20 years, it will be a major occurrence. If mailgoforward.fart goes down, you’re screwed.

The advice is, as always, use a second mail address for “sensitive” providers. Use a password manager and two factor for everything. Ideally one that integrates into your phone and browser.

For traceability, most providers support a + alias syntax now. Ie foobar+baxservice@provider.com