For this tip pictures are worth a thousand words.
Here’s an image of what a typical Outlook email client sees when autopreview is turned on (click on thumbnail below to see full size image):
Here’s what a well designed “autopreview” would look like (click on thumbnail to see full size image):
Finally, here’s the full html newsletter (again, click on thumbnail if you want to see the full size image):
Why is this important?
Millions of Outlook users decide on what email to open based on what they see in autopreview. Many more mobile users, see only the first few lines of an email. Make sure that you consider these users when you design your email campaigns and newsletters. Getting a meaningful message in-front of your readers to help them decide what to spend time on will significantly improve your open rates.