Wesley Computers wrote the first (and seemingly only) telephone message taker a while back, but that plugin seems to have slipped into disrepair and is no longer compatible with Thunderbird.
This plugin takes the best elements of that plugin - changes some things up and makes it work again.
How to Install in Thunderbird:
1. Right-click the link below and choose "Save Link As..." to download and save the file to your hard disk.
2. In Mozilla Thunderbird, open Add-ons from the Tools menu.
3. Click the Install button, and locate/select the file you downloaded and click "OK".
- Icons recoded to take advantage of the 16x16 small icons used by the customize toolbar option. Correct 16x16 icon used (Ver 1.1.5 forced the 24x24 to be used).