9. Do not write in CAPITALS.
IF YOU WRITE IN CAPITALS IT SEEMS AS IF YOU ARE SHOUTING. This can be highly annoying and might trigger an unwanted response in the form of a flame mail. Therefore, try not to send any email text in capitals.
- See more at: http://blogs.universal.org/cristianecardoso/en/19-most-important-email-etiquette-tips/#sthash.7hJhX9rc.dpuf