promoting cpa via e-mail

if i promote an offer via e-mail, is the referer blank? or do they see the referer as the email provider?

also, my network says i must use "xxxxxxx" as the subject, if i chose to use my own how will they know the contents of the email or the subject?

any answer pls guys?

Elaborate please?

Email should not be blank referer if they open it using browser I guess. Not sure but u can go figure out urself using bit. ly and send own email then click it. Only will blank if they select it using the 3rd party mail reader such as outlook.

They can ask the traffic you bring show them the email you sent to know it or you need to check the email template they let you use whether got tracking script. No ppl going complain what method you use if they can convert sales from traffic you bought. That the key.