Open Doors
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SMS marketing overview

How SMS works in Open Doors, opt-in rules, and what you can send.

4 min read Updated 2026-04-24

SMS is the highest-response channel — open rates routinely hit 98% and response rates are 5-10x email. It is also the most regulated. Rules vary by country.

  • US: A2P 10DLC registration required.
  • Canada: CRTC opt-in rules apply.
  • UK/EU: GDPR consent required.
  • Australia: SPAM Act — unsolicited = fines.