I tried the email approach, but was concerned that I would be lumped with spammers. What seems to work for me is a concise letter (who, what, etc.), sent with a composite print that I did in Photoshop that fits in a #10 envelope. I also send a larger postcard (printed by Modern) to current and former clients, just to jog their brain that I am still alive and shooting. As far as email, I have used a bulk email creator to send messages to current and former clients about things I've been up to. Seems to work for me. I'm really terrible at writing those letters, so I'd rather let the work do the selling.
