Here you dont have to give your e-mail address if you don't want to. Simply:
1st Field: addressee's e-mail
2nd Field: subject
3rd Field: your message.
Fields 4+ 5, your name and your e-mail are not compulsory. You can leave them blank
or you can fill in any e-mail and name you want.When ready click the blue button
"ODOSLAT" to send your e-mail.