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Close CRM SMS Not Sending (10DLC / A2P Registration)

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Ongoing Web Updated November 13, 2026Based on 3 user reportsHow we research

Quick answer

Close SMS fails when A2P 10DLC registration is pending, rejected or lapsed, or when carriers filter the content. Check the error on the SMS activity and the registration status.

Most likely fix: Read the error

How to fix it

Try these in order — the most common fix is first.

  1. 1. Read the error

    1. Open the SMS activity and read the error
    2. Ask Close support to check with the telephony provider
    Did this fix it?

  2. 2. Fix registration

    1. Confirm registration status in Close settings
    2. If rejected, email support to resubmit
    3. Ensure your website has compliant Terms and Privacy Policy
    Did this fix it?

  3. 3. Check number and content

    1. Use a Close-rented SMS-enabled number
    2. Make sure opt-in consent exists and avoid regulated wording (e.g. debt collection)
    Did this fix it?

Symptoms

SMS shows an error, messages undelivered, sending suspended.

Why it happens

  • A2P 10DLC registration pending or rejected
  • Non-compliant terms/privacy policy or opt-in
  • Carrier content filtering after approval
  • Using an external number (SMS works only on Close-rented numbers)
  • International SMS not supported

This guide also covers

  • close crm sms not sending
  • close 10dlc
  • close sms blocked

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