I honestly don't recall if it is against policy, and I've never witnessed a case where it has come up, but I wouldn't say it is "allowed". I'd say the same thin

I honestly don't recall if it is against policy, and I've never witnessed a case where it has come up, but I wouldn't say it is "allowed". I'd say the same thing about emoji use really. Email is business related correspondence and a certain amount of professionalism is expected.