With e-mail offering the almost immediate gratification and low overhead cost that direct mail just can't quite pull off you may be considering if this marketing medium can work for your firm.
Keep in mind that direct e-mail marketing is most likely to work with current clients. We've all been spammed before and you've probably immediately deleted e-mail from a source you are unfamiliar with. However, Jupiter Communications conducted a survey recently that revealed 14% of consumers welcome promotional e-mails from companies they haven't work with before.
So 14% doesn't seem like much for your efforts? In a medium that requires more ingenuity than cost this just may be an option worth looking into. It's a good way to stay in front of current clients while appealing to new ones.