Do's and Don'ts of Email Writing
Dos/Don'ts

Be to the point so as to why you're writing, within the first two lines of the message.
Use a concise and specific subject line. A good subject line helps readers prioritize messages and find them later.
Limit your e-mail to a single topic only. When you cover multiple topics in a single message, your core message might get diluted.
Be courteous. We're all in a hurry, but it is essentially important to write "please" and "thank you," and you'll get a better response.
Don't send an e-mail when a phone call would be more appropriate. Don't engage in rounds of e-mail when a quick phone can resolve the issue.
Never write anything private, confidential or potentially incriminating in an e-mail.
Don't introduce a new topic in the middle of an e-mail thread. If you're changing the subject, then make you change the paragraph.
Don't copy people on an e-mail unless there's a good reason for it. It feels as though you are spamming your inbox.
Don't forget to proofread. Always take a moment to proofread before you hit the send.
Don't assume that recipients will read till the end to figure out what you want.
