*poop!!!!11!!!1!!one!@
yahoo.com does NOT make the sender seem very professional...your email will likely get deleted before reading.
*ALWAYS fill the subject line with something. Make sure recipient knows EXACTLY what the email is about.
*Typically salutations like "Dear Mr. Clarke," or "Dear Ms. Gomez" work well. Use recipient's formal title. If you're unsure about marital status of a female recipient, use Ms.
*Provide your name, the group you're with, and exactly why you're emailing in the opening. Get to the point ASAP!