Almost everything I sign up for these days ends up sending me several emails reminding me that I have done so. Yes, I did sign up. No, I don't want to be remind

Almost everything I sign up for these days ends up sending me several emails reminding me that I have done so. Yes, I did sign up. No, I don't want to be reminded of it all the time. It is becoming annoying enough that I avoid signing up for things in the first place, or at least give them an email address I can easily filter.