Expanding on his earlier tips on Mail John Carter sends this info:
I tried to find something that could
show all the keyboard shortcuts for Mail.
I couldn’t find one place that showed them all.
I found that Command-K was shown in two
different places with different functions. That’s not helpful.
The best place to look for the keyboard
shortcuts for any application is to look at the Menu list:
Here's the list of keyboard symbols. Double click to enlarge.