1-Thou shalt include a clear and specific subject line.

2-Thou shalt edit any quoted text down to the minimum thou needest.

3-Thou shalt read thine own message thrice before thou sendest it.

4-Thou shalt ponder how thy recipient might react to thy message.

5-Thou shalt check thy spelling and thy grammar.

6-Thou shalt not curse, flame, spam or USE ALL CAPS.

7-Thou shalt not forward any chain letter.

8-Thou shalt not use e-mail for any illegal or unethical purpose.

9-Thou shalt not rely on the privacy of e-mail, especially from work.

10-When in doubt, save thy message overnight and reread it in the light of the dawn.

11-That which thou findest hateful to receive, sendest thou not unto others. (oopps, there are actually 11 commandments!)