Klaviyo SMS Not Sending or Skipped

How to fix it

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

1. 1. Verify the sending number

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   1. Go to Settings > SMS and check the number's status
   2. Wait for verification to finish; unverified toll-free numbers are rejected by carriers
   Did this fix it? Yes No

2. 2. Check quiet hours

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   1. Open the campaign's recipient list and look for Skipped: Quiet Hours
   2. In campaigns choose whether affected messages are delayed or skipped
   3. Quiet hours are checked per recipient at send time; US and Canada use area code by default
   Did this fix it? Yes No

3. 3. Check credits and status

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   1. Confirm SMS is active on your plan and credits remain
   2. Check Klaviyo's status page for SMS incidents (for example a March 2025 toll-free delay)
   Did this fix it? Yes No

Symptoms

SMS campaigns or flows show recipients but messages aren't delivered or are marked skipped.

Why it happens

• Toll-free number not yet verified (community says 7-10 business days)
• Recipients skipped for quiet hours
• Messages delayed during a platform incident
• Out of SMS credits or SMS plan not active

This guide also covers

• klaviyo sms not sending
• klaviyo sms quiet hours
• klaviyo toll free verification

The same problem in other apps

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