Just quick question

[steve208]

Do I have to do a covering letter for a job which I have seen on a website where it says...please e-mail your cv to us.

[WendyS]

Yes, I'd send a brief covering letter saying why you think you're a good candidate for the job.

[chazza]

Yes, so that they know which job you are sending your CV with reference to

[ilovetohelp13]

You should. The cover letter will serve as an introduction to the CV attached to the email.