Yes, it is possible through this app! All you need to do is to write sender email (the one that will be shown as "From"), subject, recipient email and a message.
When recipient opens the email and tries to reply, reply email will go to the email that you wrote as sender address (Email from).
This app should be used only for making jokes on friends. We are not responsible for any consequences. No data will be stored on our Server.
If you are "sending" from Gmail (Sender email/Email From) to another Gmail address, recipient might get a note that email wasn't sent from this email directly. P.S. Sometimes, it takes few minutes or less for recipient to receive email.