SUMMARY: If 90% of your email recipients are on AOL, then don't bother reading any further. Your email probably looks fantastic in the in-box.
However, if your readers use Outlook, Hotmail, Yahoo, Mozilla Thunderbird (or a host of others), chances are your email templates need a redesign … as of yesterday.
Why? Your email may look close to unreadable in more than 60% of their in-boxes. Bring this article to your next meeting with your design team: