One of the reasons I have an old crufty Hotmail.com mail account is their spam filtering works well yet they don’t block signup emails. I’ve always been able to get these kind of mails though sometimes you have to dig about to locate stuff in the junk folder. But it never seems to drop them.
There’s a lot not right about it too but it works well for signups etc. Worth considering if your primary mail provider is a bit keen on the filtering.