A cover letter usually is three paragraphs long and outlines why you are applying for a specific position, a brief overview of your professional background. In the email body, introduce yourself briefly, mention the position you're applying for, and express your interest in the role.First paragraph should grab the reader's attention. A reader just sent me a cover letter that I can't resist posting, especially because it comes with a "before" version and the "after" version she created. Browse our library of cover letter examples for hundreds of industries. Get writing tips and advice from career experts for every section of your letter. A cover letter is a short letter written directly to the person who will read your job application and resumé. It doesn't matter what time you send your resume because you are sending it to a work email. And the hiring manager only checks it during business hours. Learn how to write effective resumes and cover letters, view sample resumes and cover letters, and get tips for completing job applications.