.biz was a new TLD, so yeah. It was part of the 2000 round of new TLDs. I don't think I've seen a .museum, but all of the others from that round give me negative vibes, although I guess slightly less than most of the newer new tlds.

That said, I've got a 'clever' .pictures I use to share images and a totally appropriate .fun that has no need to have positive domain associations.

What do you mean "email whitelist"?

Presumably a list of TLDs or domains they will receive email from rather than only blocking bad domains as they come up.