We cannot send this document through fax.

[tufguy]

1) We cannot send this document through fax.

2) We cannot fax this document over to you.

3) We cannot fax this document to you.

4) We cannot send this document to you by fax.

5) We cannot send this document to you from fax.


Please check my sentences.

 

[emsr2d2]

1) We cannot send this document through fax. :cross:

2) We cannot fax this document over to you. :tick:

3) We cannot fax this document to you. :tick:

4) We cannot send this document to you by fax. :tick:

5) We cannot send this document to you from fax. :cross:


Please check my sentences.

See above for those which are correct and incorrect. Sentence 3 is the most natural and likely. There's no need to use "send by fax" when "fax" is a verb.