What app do you use?

you can use nodemailer if you want to use your own personal email and you can use resend if you have a domain

Got it, do you know if vapi has it integrated?

nah i dont think vapi has this integrated, i have coded this logic, i capture the callid during the call and then after the user clicks submit i usually wait 5 second for all the analysis to be completed and then i hit https://api.vapi.ai/call/{call_id} and then extract the relevant data