When sending a fax from your computer, i.e. a Microsoft® Word document,
you open your email program, using the same process as with any other
email, attach the Word document and in the address field you would enter
the recipients fax number as follows: 0115551236@cyberfax.co.za
See example below:

The subject line is left blank.
The Body of email is ignored to prevent Antivirus messages becoming
cover page. For a cover page attach a word or similar doc prior to
attaching actual document to be faxed