Is it correct to say:
"I'll send you this file per E-Mail"?
Or
"Please send me this file per E-Mail"?
I know most people say "I'll send you this file by E-Mail" or "Please send me this file by E-Mail".
Is "per E-Mail" also correct?
Is it correct to say:
"I'll send you this file per E-Mail"?
Or
"Please send me this file per E-Mail"?
I know most people say "I'll send you this file by E-Mail" or "Please send me this file by E-Mail".
Is "per E-Mail" also correct?
Yes, you could, but I think it's better to say via email. Although per has an archaic meaning of "by means of", it's not widely used.
Edit: As Jon Hanna points out in his comment below, "per" often shows up in "as per" (meaning "according to") in business language, as well as meaning "for each", and some of us (perhaps most of us) may not recognize either the meaning or the correctness of "per email" right off.
You likely want business language to be clear and unambiguous, and for there to be no question as to the correctness, so it's generally best to avoid this particular usage.