UPDATE: For those using Thunderbird 3, please refer to this post.

Like lots of people who use Thunderbird, I was getting irritated when receiving emails from Outlook users with the smiley’s replaced by J’s.

Unsuprisingly, it’s Microsoft’s fault because they just simply don’t care about other clients and standards. Anyway, here’s how to fix it:

j’s in Thunderbird emails Outlook smiley faces | The Swan Song.