Hi,
Thank you for contacting us!
Do you mean you want to keep the Email Address and Return Path different?
If yes, uncheck the “Set the return-path to match the From Email” option and it shall open a textbox input where you can set the return path.
This settings overrides in some email providers like Gmail where they don’t allow to keep email address and return path different due to some security concerns.
http://lee-phillips.org/gmailRewriting/
Thanks & Regards
Support Team
Tech Banker