Etiquette - Can't say Netiquette as that doesn't begin with an E and it's a silly word anyway:
As the IT department, you have a responsibility to set the rules and best practice for e-mail. After all, if you don't who will?
Here's a good set of general rules to use as a basis
From a personal point of view, ask yourself these three questions:
1. What is the purpose of the e-mail I am going to send
2. Remembering that the power and meaning of any and all communication is with the receiver and not with the sender, after you have written the e-mail, lok at it - is it clear, concise and compelling?
3. Only send e-mails that you would be happy to receive yourself
The above does not take any extra time - it saves time, for a start you will not have to fend off that aggressive phone call complaining about the e-mail...
Tomorrow, how contrived can I be in working out what the "M" stands for...?
One week of the most powerful words in the world...words that work and words that wound.
Today, use
Someone's name
The sweetest single word in any language
And avoid : "Try"
Go on, try to stand up - you will either stand up, or not
Don't "try" - DO!
Tomorrow - The judgement word that makes us ****** all over ourselves...