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Text messages are not sending

Work down the list: Twilio connected, Send test SMS, then the Twilio trial trap.

Updated July 17, 2026 · 2 min read
Plan: All plansWho: Everyone

When texts stop sending, work through this list in order — it is almost always Twilio credentials or a Twilio trial restriction.

1. Is Twilio actually connected?#

Open Settings and check the Twilio card. If it shows disconnected, reconnect with Connect Twilio — Account SID, Auth Token, and your Twilio number. If you regenerated your Auth Token inside Twilio at some point, the stored one died at that moment; paste the new one.

2. Send a test#

Click Send test SMS and text your own phone. If the test arrives, Rennt and Twilio are fine — the problem is specific to the recipient (bad number format, a landline, carrier filtering).

3. The Twilio trial trap#

Trial Twilio accounts can ONLY text numbers you have verified inside Twilio. So the test to your own (verified) phone works, while texts to customers silently fail. The fix is upgrading the Twilio account to paid.

4. Check the basics in Twilio#

  • The account has balance and is not suspended.
  • The from-number still exists on the account and can send SMS.
  • Twilio's own message logs show every attempt and the exact error.
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Twilio's message log is the ground truth. If Rennt handed the message to Twilio, the log shows exactly why it did not reach the phone.

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