What to write in the body of the email when sending resume to a company for mechanical engineering job?

The body of the email should contain a cover letter written using the standard business letter format. The cover letter should talk about two things: what you can do for the employer and what job you are applying for. Never send your resume without a cover letter, your application will not be taken seriously. The cover letter when used correctly will increase your chances of getting an interview for the job you are applying for. The cover letter should contain 3 or 4 paragraphs: The first paragraph should explain why you are writing the letter. The second paragraph should talk about your skills and experience. Your skills should be phrased to show your potential employer how these skills will be of direct benefit to their company. The third paragraph is where you close and provide further information to your employer by stating that you have attached your resume. The objective of the cover letter is to establish that you are the best match for the job advertised. The cover letter should focus on the employer. You will get better results if you cover letter is addressing the needs of the employer, show your employer how you can solve their problem, in addition show how your experience and roles for previous jobs are similar to the position that you are applying for.

I think you should create construct a good cover letter or if you dont good in writing a resume writer that can help you to write. You can try the http://www.expatcareers.com/Career_Services they are good in creating a cover letter.