Trumpy,
A thought. If there is actually a correlation between lengthy new outgoing email that you've just created and the freeze. . .examine the settings on your email software. There should be an automatic background save of what you are creating to a "draft" location. The interval between automatic saves can be shortened. That way, if you have to reboot, you'll only lose the last little bit, not the entire thing.
If a draft save capability is not available, using File - Save should accomplish the same thing. Just remember to do it often, while preparing that long missive for the supplier. ;D
