Hi,
I would like some sort of system STOP if a set of brackets is in place an email that would be were a user would be required to enter custom info. For example "We got your info from [LEADSOURCE]." And if someone tries to send the email without clearing the brackets and adding in a lead source (eg. "We got your info from CarGurus.com") then the system would prompt them and not let them send it so it can't be accidently sent to a user blank.