Most of my emails are short. When I must write a long one, it's usually because it includes technical content. In that case, I do this:
Bob,
I discovered why the frobnostication terminal was slow and submitted a fix. It will be QA'd tomorrow. Please find the technical details below.
Regards,
tophat02
<A bunch of newlines so Bob can see it's a short email with some appendix-type stuff below>
Now here's where I get into the technical details of the blah blah blah. This can span several paragraphs if I want. I don't worry about because I know Bob got the point up there -^
Bob,
I discovered why the frobnostication terminal was slow and submitted a fix. It will be QA'd tomorrow. Please find the technical details below.
Regards, tophat02
<A bunch of newlines so Bob can see it's a short email with some appendix-type stuff below>
Now here's where I get into the technical details of the blah blah blah. This can span several paragraphs if I want. I don't worry about because I know Bob got the point up there -^