Guest post from HP's Business Answers blog
#3 is a real pet peeve of mine - I think it's worth it to send a quick tanks or acknowledgement. I routinely get asked to examine a problem or give advice. So I respond, taking up my own time to be thorough and accurate. Then i never hear anything back again. It's not only rude, but I'm also left not knowing if all the questions were answered, or even if the email arrived.
You wouldn't walk up to a colleague, ask them a question and get an answer, then turn around and walk away without further ackowledgment. So why is it acceptable in email?
#5 I prefer highlighting or bold. It stands out better, especially when you work in a world of acronyms like we do.
#9 The Sent Items folder already does this for free.
We always find this type of article helpful - thanks TechNet! Silk Shortbread