I was told once that if you smile when talking on the phone it makes you sound more pleasant. I try to do this whenever I speak to anyone by phone (especially being in prison, want everyone to know that i'm a rehabilitated tranny, not a scary convict!)
So, I am going to try something else, smiling while writing emails! :)
Look, you try it. Next time you're writing an email, smile while you write it and see if your recipient doesn't love it. Try it!