"People think that the first draft is the big event and that revision is cleaning up afterward. But the first draft is really setting up the chairs, tables, and cups, and revision isn't cleaning up after the party, it is the party."

"All first drafts are terrible. I don't care if you're Hemingway."

"What comes out unfiltered from anyone's mind is mud."

The first two quotations come from writing professors whose names I've since forgotten (and they were quoting other people whom they'd forgotten). The last one is one I just made up myself. But regardless of the source, the advice is sound: no email should be clicked-to-send without revision.

Sound advice considering this is the contemporary communication medium of choice.