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How to use Custom Sender Email from the Form Email Field?Asked by GlobalNetwork on August 04, 2013 at 09:18 PM
I assumed you are referring with the Custom Sender Email using the "Email" field from your form. If yes, you can do that, but you have to setup SMTP through Mandrill.
Please follow this guide: https://www.jotform.com/blog/86-Send-Form-Emails-From-Your-Own-Email-Address-JotForm-Now-Support-SMTP
After setting up these methods, you should be able to see the "Sender Email" section with the option to choose the Email Field. See screenshot below:
PS. I've change your thread title.