Problem: Mozilla Thunderbird (running on a GNU/Linux machine) doesn’t display emoticons in messages that were sent using Microsoft Outlook. Instead, emoticons appear as the letter “J”.
Cause: Microsoft’s lack of concern for web and email standards
Solution: Install the “Wingdings” font so that Thunderbird can actually render the emoticons. On the latest versions of Ubuntu, this is as simple as clicking on the wingding.ttf file and then clicking Install. You can get Wingdings from your Windows computer. Just go to C:WindowsFonts and look for wingding.ttf. It should be near the end. Copy this file to your GNU/Linux machine and install it. Next time you start Thunderbird, you should be able to see emoticons in any message sent by a friend using Microsoft Outlook.