Is there a way to speed up sending an email or sms from my app?

I’m using Postmark and Twilio to send a summary of a questionnaire either by email or text. When the page is processing the request to send either email or sms, the page rendering is quite slow. Please let me know if there is anything to speed up the rending or process. Thanks!

Maybe you are not using a backend workflow to process the email?

Is there a tutorial about how to do a backend workflow to send sms or email?