I would say those visas have been granted and I hope they have, but obviously you still have to wait and find out. I think if there's a VAF or REF number, usually in the subject line, it means the visa's been granted as that, simply, is the visa number. And if the visa hasn't been granted then the applicant needs a way to contact the relevant authorities which is what the contact email address would be for. This is speculation, but it makes perfect sense. Some people say all the emails are generic (although they're not even that as they vary around the world) but I think that's only for confidentiality and privacy purposes. UKBA can say they didn't say anything explicitly or even implicitly about what the decision was, but that doesn't mean there can't be some practical differences between yay or nay emails.