Mark Eckenrode is a certified Guerrilla Marking expert. Mark has done email consulting with the likes of the Donald Trump organization. Mark is a big believer in email marketing but stresses you really need to stand out and tell a story.
Below is a video from Mark at RETechSouth this year talking more specific about email campaigns for real estate agents.
Here is an e-book Mark has on his site that I highly recommend. Make sure you check it out.