Even Gmail has unlimited aliases, via catch-all (everything after +). With Gmail, specifically, you can use dots (.) in an e-mail address for aliases as well. I'm not using Gmail, but I would not use an e-mail service without catch-all. The dot behavior, however, is weird. Nobody does it that way, 'cept Google.

The + isn't completely helpful if the intent of using aliases is related to spam. All spammers know how these work and can figure out the main address by discarding the + and whatever comes after it. The dot has been somewhat of a problem to use where it seemed as if Gmail allowed other people to create the same address with dots (I don't recall the details since this was a long, long time ago).

You can opt to only ever use + and then put a lot of weight on spam score on anything not using the + (or using whitelisting without the +). It can also help when trying to figure out who leaked your data. Literally, data breaches have been found/exposed by a few heroes who used this feature.

Or unlimited aliases

    - service@example.com
    - anotherservice@example.com

And they all land on the same inbox and you don’t have to worry about those services that still don’t allow +

> The dot behavior, however, is weird. Nobody does it that way, 'cept Google.

I think it makes good sense for a free email provider. You don't want to distinguish bobsmith@... from Bob.Smith@.... It will just cause misdelivered emails.

There's mxroute in the U.S. that provides a similar service, but has pricing primarily based on space usage.