This is going to my first post in this blog, and along with some other more technical posts, I will dual post it in my own blog over at dragly.org.
If you are using Thunderbird for e-mail and want to send mathematical formulas to your contacts, you should consider the LaTeX It! plugin or the Equations plugin. The former requires you to have LaTeX and ImageMagick installed, while Equations uses an external server to generate your images.