Is it OK to send an email AS a CV?

To those people who go over resumes and hire people:

I’m applying for jobs mostly on the internet by sending my resume as an attachment to an email. The email itself contains my cover letter. Is there anything wrong with this? As in email application ettiquette? I guess I could write the CV in a Word file and attach that as well, but that seems a bit silly.

Follow up question: why is cover letter abbreviated CV and not CL?

CV is Latin for Curriculum Vitae, (a short account of one’s career and qualifications prepared typically by an applicant for a position), not cover letter.

Locking duplicate thread.