I'm redesigning our company email template. At the moment links are grey, bold and not underlined. I don't think this makes it very clear that it is a link. My gut instinct tells me that I should make them the default blue/underlined. Design wise I could make them look better but at the end of the day I want people to click them not appreciate their aesthetic beauty. Also our client base isn't particularly web savvy, they're not clueless but their not exactly the facebook generation either.
I will be presenting my thoughts to my boss tomorrow and I was wondering if anyone knew of any research in this area? If you don't know of any research I would love to hear your opinions.