How to send auto-responder email from my own email address?

I need the auto responder mail to go by my webmail.

I am not sure f I have understood your question correctly. Do you mean to say that you want to send auto-responder email from your own email address?

Please note that you can use your own email address with SMTP setting to send submission email from your own email address. You may like to take a look at the following guide which should help you:  https://www.jotform.com/help/244-How-to-Setup-SMTP-for-a-Form 

You may also like to take a look at the following guide as well and see if it fits into your requirement:   https://www.jotform.com/help/238-How-to-Add-a-Custom-Sender-Address-to-an-Email-Alert 

Hope this helps.

Do get back to us if you have any questions.