You may have occasion to e-mail your resume to a prospective employer or someone else. Before e-mailing your r sum you need to make the following changes to your resume and keep it under a separate file. Don't send a resume as an e-mail attachment unless you're invited or instructed to do so. You need to know what types of resumes this particular employer is prepared to accept. That is the fundamental question.
Many employers now spell out their preferred formats.
Try to find that out before sending your resume, and follow instructions.