Do you know how your email newsletter looks when read on a mobile device?
Take 300 seconds today and take a look. Enlist your friends and test as many devices as you can–iPhone, Android, iPad, other tablets. You might even see a difference between the iPhone 4 and the iPhone 6.
The easiest way to see what your friends are seeing is to ask them to take and send a screen shot to you. Then you can see if your information is readable, or if you should consider a redesign.