Nice question, but I don’t know if we can do it via FSCF WordPress UI.
All I know is to track the ‘thank you’ page generated after someone’s submitting the form, like the Author said in here :
http://ww.wp.xz.cn/support/topic/plugin-fast-secure-contact-form-google-analytics-tracking
I wonder if we can just do it that way, that’ll be very useful.
