When sending an email, how it is written makes a big difference in how it is received.

A couple of quick tips on email ettiquette.
Do not put your message in the subject line.
Create a subject that briefly summarizes the purpose of the email.
Start with a formal introduction.
     Dear Mr./Mrs./Ms.

Write a paragraph explaining what you need, be polite.
End with a formal salutation.

Thank you,
     Mr. Van Hoorn

Email is another form of communication and how you communicate often impacts how you are responded to.

Check out this video for more ideas.