The document discusses 4 email marketing trends for 2013: 1) Email marketing remains highly effective with a high ROI. 2) Marketing is shifting from standalone email campaigns to integrated customer relationship management across the lifecycle. 3) Deliverability is increasingly dependent on both technical and non-technical engagement metrics. 4) Mobile readership of email is growing rapidly as people access their email accounts from multiple devices, so email design must be optimized for small screens.