SMS Live

How SMS outreach works in Landing Zone — A2P 10DLC registration, the batch eligibility pipeline, automatic opt-out language, and carrier risk.

Updated 2 min readMaintained by Landing Zone

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SMS is text-message outreach sent from your Landing Zone phone numbers. It runs on the same batch engine as email — draft, preview, approve, send — but every SMS batch first passes through an eligibility pipeline that screens each contact before a message goes out. Replies arrive in per-number SMS inboxes in your unified inbox.

Setup requirements

  • Provision a phone number. Go to Settings → Phone numbers to set up the number you'll text from.
  • Complete A2P 10DLC registration. Registration happens with the carrier registry outside Landing Zone; you enter your Brand and Campaign IDs in the Trust Center, which tracks your registration status. SMS sending is gated until your registration is approved — there is no in-app submission flow. See the A2P 10DLC setup guide.

Capabilities

  • Batches and campaigns. Draft, preview, then approve and start; pause, resume, stop, or discard while a send runs.
  • Eligibility pipeline. Before sending, every contact is checked for verified consent, the 30-day cooldown, suppression-list membership, line type (with a "Send to unverified numbers?" dialog when line types are unverified), and quiet hours. Excluded contacts are counted in the pre-send preview with reasons.
  • Automatic opt-out language. The first outbound SMS to a contact automatically appends "Reply STOP to opt out." STOP and similar keywords trigger suppression, set consent to REVOKED, and send a confirmation reply.
  • Templates with spin syntax. Merge fields and message variants work for SMS just as they do for email.

Rules and risks

SMS generally carries stricter consent, carrier, and registration considerations than ordinary commercial email — treat it as the strictest channel you send on. Batch and campaign SMS requires VERIFIED consent with recorded proof; skip-traced and imported contacts default to UNVERIFIED until an opt-in is recorded. Read SMS consent before you build a list.

Carriers filter messages independently of anything Landing Zone controls, and filtering risk climbs sharply with cold outreach — see cold SMS risk. The fixed 30-day cooldown reduces repeat-contact risk, but none of these controls determine whether a specific message is lawful. The audience, content, timing, and legal basis remain your responsibility.

Current status

SMS is live in Landing Zone; sending on a number is gated until its A2P 10DLC registration is approved.

Limitations

  • No sending before your carrier-registry registration is approved.
  • The 30-day cooldown is fixed at 30 days and is not configurable. It applies to batches, campaigns, and automations — not to manual 1:1 replies from the inbox.
  • Contacts without VERIFIED consent are excluded from batch and campaign sends.
  • Automated SMS is limited to Daily SMS Outreach, which generates pending-review batch drafts that require manual approval.