I want to setup an auto-reply for our lead capturing Unbounce page and as far as I understand I need to use a third part service. Since my team already uses SendGrid and there is a zapier for that integration (https://zapier.com/app/editor/template/4791) I’m trying to find a way to use it, without making our systems vulnerable to bot attacks.
For example if we’re not validating email addresses before they reach SendGrid, a bot can start mass-submitting fake addresses that bounce on SendGrid until that service blocks us.
How would I go about solving this challenge? Do I need to be checking the addresses with another service? Or maybe use some form of CAPTCHA?