Thunderbird -- Colored Diffs

[TheBlunderbuss]

This may have been out there for a while, but I'd thought I'd mention it 
anyway.
Colored Diffs is an extension for you Thunderbird users out there that 
makes it easier to read those diffs, even when they're part of the email 
message itself.
I was happily surprised at the functionality :)

https://addons.mozilla.org/en-US/thunderbird/addon/4268