If you are given the choice of applying through traditional mail or email, use email. Applying via email is less expensive and gets your application to the employer more quickly (and in a format that is easier for them to process). When applying via email here are some guidelines to follow:
Here are a few other tips for email communication with employers.
Some employer and job search websites will require you to submit a cover letter online. Others may give you the option, but not require it. Even if a letter is not required, it is a good idea to submit one with your application. On some websites, you upload a file containing your cover letter (often in Word, .pdf or text format). On other websites, you will be given a text box into which you copy and paste your cover letter. Write, edit and spell check your cover letter in a word processor and then copy and paste it into the text box. Use a format that aligns your information along the left margin to allow for a better format in the text box.
Even if a website does not give you a place to upload or copy and paste a cover letter, you might consider adding a cover letter as a part of your resume. This would allow you to specifically discuss your qualifications for the position and why you are interested in working for that organization. To do so, simply append the cover letter by copying and pasting it to the beginning or end of your resume.