MailerSend
Knowledge base

SMS verification and usage limits

Secure your app's SMS communication with our guide on authentic phone verification and managing recipient limits.
Note:

SMS functionality is currently available exclusively within the US and Canada, aligning with our commitment to secure and compliant messaging practices.

Upon acquiring a phone number via the Plan & Billing section, completing the verification form is a crucial step. This process is required by mobile carriers to ensure that your SMS services are used responsibly and according to compliance standards. Failure to verify will prevent SMS delivery. After submitting the form, you’ll receive a notification regarding the status of your phone number verification.

Remember:

Important compliance update

As of November 8th, 2023, in line with regulatory requirements, all toll-free numbers must undergo a verification process by our partners to enable SMS delivery. Unverified numbers will face delivery issues. Please allow 1-4 weeks for the verification process.

Verifying your phone number: Step-by-step

1. Navigate to the SMS section.

2. Select Phone numbers.

3. For the desired number, click the arrow beside Manage, then select Verify.

4. Fill in the verification form with your business details and intended SMS usage. This information is required by our carrier. You'll need to provide:

  • Company name

  • Business address

  • Business website URL

  • Business contact: Name, email address and phone number

  • The category that best represents your SMS use case

  • Details on how you collect SMS opt-in consent and your public SMS opt-in URL

  • 1-3 examples of the types of messages you'll be sending

  • An estimate of how many SMS messages you plan to send each month

  • Business registration number and type

5. When you've filled in your details, click Submit.

Verified recipients

Add up to 10 verified recipients for testing the SMS functionality of your app, ensuring that each step of your messaging service is thoroughly vetted for real-world use.

Recipient verification serves dual purposes:

  • Pre-approval testing: Before your phone number approval, utilize the trial number to send SMS to verified recipients.

  • Post-approval evaluation: After approval, continue testing app updates or new features using your verified recipients from either the trial number or your purchased one.

To add a verified recipient: 

  1. Go to SMS.

  2. Open the Verified recipients page.

  3. Click Add recipient. 

  4. Enter the phone number in international format (e.g., +19192223456). At this time, only US phone numbers are accepted.

When adding a verified recipient, the owner of the phone number will have to verify it by entering the verification code in the modal. Only then can this number receive SMS marketing messages.