I got an email today - a friendly reminder that daylight savings time started soon. It was a nice gesture, and the sender hoped I would see (or better yet, print out) the business card he attached to the message. Too much work.
If the ultimate goal is to get your card in my rolodex, attach a vcard instead of a jpeg. It's a little more work on your end, and a lot less on mine. The best way to earn a new customer is to make your product or service the easiest decision they've ever made.