Formbuilder - empty "From" address

I'm a newbie to CS Cart and I've adopted an old CS cart install (2.0.15) and formbuilder is sending emails with a From Name, but no From" Email so the emails are being rejected by the server. Where is the config for this field? The form builder provides an email to address, but no from.

Any help is appreciated.

Also, is there a way to log this information to a file?

Thank you.