When you initially apply for a job or if you are working with a prospective employer that is miles away, you may have to do the majority of communicating via email. In some instances, this even means submitting your salary requirements via email, which might seem awkward. However, there are ways to draft a professional email with your salary request, and at least get the dialogue going between yourself and a potential employer.
Do some research on other salaries for positions similar to yours in your geographical area. This helps you to determine what the going salary is for your position and ensures that you don't aim too high or low when you make your request in your email.
Start your email with a greeting, your name and the position for which you are competing. This reminds the receiver of who you are and your potential position, so that she doesn't get your salary requirements confused with other emails or inquiries she may receive for that same position.
State a range in your email. Never ask for a specific salary, as this can not only knock you out of the running if you aim too high, but it may make it seem as though you are unwilling to negotiate when it comes to salary. Aim a little higher than what you know you want, because the company will likely talk you down, which means you will end up around the range you desire.
Insert a line saying that you are willing to negotiate. This makes your request seem much less rigid and doesn't solidify anything via email. It simply states your range and then opens the floor up to negotiations once a job offer has been made, or at the very least once you are face-to-face in the interview.
Close the email with a thank you and a reiteration of your interest in the position. Just because the email is specific to salary, doesn't mean that you can't take a moment just to state to the receiver how interested you are in the position. In fact, you can also state that your willingness to negotiate in terms of salary stems from your intense interest in working with the company, just to drive the point home.