Dive Brief:

• A new report from email marketing provider Yesmail shows that mobile email conversion rates jumped 70% year-over-year in Q4 2014. 
• Yesmail attributes a big part of mobile email's success to the utilization of responsive design, or mobile-friendly formatting. Email marketers using responsive design saw 40% higher CTO rates than when they used non-responsive emails. 
• Desktop email conversion rates for the same time period dropped by 4%. 

Dive Insight: 

Mobile use on the whole for both personal and professional needs has been on the upward swing. Therefore, it's no surprise that mobile email is taking off. The jump could possibly be attributed to email marketers becoming more skilled at the craft and embracing the advanced technology of responsive design.