eForm resubmission and eFormOnBeforeMailSent function invocation

Hello,
I'm using MODX 1.05 with the snippet eForm and the parameter eFormOnBeforeMailSent to invoke a function to update a database table.
Everything works fine but if the user clicks back on the browser and re-submit the form, I get a message that the form was already submitted but the function associated with the event eFormOnBeforeMailSent is invoked one more time creating duplicate data in the database.
Is there a way to prevent the function to be re-run once the eForm has already be submitted?

Thanks for your help and time

Quote from: eclipseTalk at Dec 18, 2012, 10:20 AM

Is there a way to prevent the function to be re-run once the eForm has already be submitted?

If you're really really sure that form was submitted the first time, you can check
documentation for the following parameters:
&protectSubmit
&submitLimit

Thanks for your reply. The &protectSubmit parameter by default is set to 1. The form display a message when it was already submitted but the function associated with the paramter eFormOnBeforeMailSent is always re-run...

Quote from: eclipseTalk at Dec 18, 2012, 02:09 PM

The &protectSubmit parameter by default is set to 1. The form display a message when it was already submitted but the function associated with the paramter eFormOnBeforeMailSent is always re-run...

I tried above scenario with protectSubmit=`1`&submitLimit=`5` in Chrome 23, and eForm
blocked the second submission. Check if the right parameter name points to your
beforeMailSent function. Are cookies enabled in the browser?

Thanks using both protectSubmit and submitLimit works fine. I was only using protectSubmit.