To add an SMS opt-in, collect explicit consent to receive text messages — through a signup form field, a checkbox, or a keyword people text to your number — then store each phone number in Mailpro with proof of that consent. Consent is a legal requirement before you send any marketing SMS.
What makes a valid SMS opt-in?
A valid SMS opt-in is clear, specific and freely given: the person knowingly agrees to receive SMS from your business, separately from any email consent. Record when and how they opted in, because SMS marketing laws require you to prove it.
A dedicated signup form is the simplest way to capture SMS consent and the phone number together.
How to set it up in Mailpro
- Add a phone-number field and an explicit SMS-consent checkbox to your signup form.
- Publish the form and collect subscribers into a dedicated SMS list.
- Send a confirmation SMS so subscribers know they’re in and can opt out.
- Keep the timestamp and source of each opt-in on the contact record.
Related questions
Once your list is ready, see how to send SMS with Mailpro.
Mailpro and SMS
Beyond the opt-in — grow a compliant SMS and email audience
Mailpro captures consent, stores it with each contact and lets you message by SMS or email from one place.