Marketing and operations teams collecting phone and email details from forms, lead ads or event sign ups know the frustration of a signup list full of addresses that were never real to start with, and phone numbers that go with them. Mailcheck exists to catch those before they cost anything, and paired with Mobile Message through Zapier it can decide who is worth texting at all.

Run a new Typeform entry, Google Form response or Eventbrite registration through Mailcheck's email verification first, and only genuine sign ups reach the next step. A confirmation text only goes out once an email address has been verified, a contact only gets added to a Mobile Message list once it has checked out, and a new contact record only gets created for a registration that turns out to be real rather than a typo or a throwaway address typed in to get past a form.

For any business that treats an SMS list as something worth protecting, that verification step means the numbers being texted belong to people who actually signed up, not addresses invented on the spot. It keeps the list smaller, but every contact left on it is one genuinely worth reaching, and every text sent afterwards lands with someone who meant to hand over their details in the first place.