I had the BA one before as well. Also had a very plausible email from Vodafone saying that they have sent an order of new phones - as we changed mobile supplier last week it was amazing timing! Our IT department were saying the attachments had a minor but irritating virus which was a pretty disgusting porn app (remember I'm not technical if I have got the terminology wrong).

Moral of the story seems to be if an email is too good to be true then it is!