Can't recommend FastMail enough- it has aliases which automatically forward mail from [email protected] to your [email protected] - This is very similar in practice to the + trick with gmail[1] but with the benefit that your email addresses will pass all stupid Javascript email validation rules.

[1] https://www.thewindowsclub.com/gmail-address-tricks

You can also set up wildcard aliases, e.g. I have the equivalent of *@example.com, leading to addresses like [email protected].

Been using Fastmail for ages... great provider.

I'm not sure what the up or downsides would be, but I personally just have all mail sent to *@mydomain.tld forwarded to a single email address. This way I can give each service a unique email address, while preserving the ability to divine whether a particular address has been lost or stolen, by looking at the sent to field.

Well, there's the obvious comfort of having all your mail in one place -- and all the obvious disadvantages that entails, I suppose.