Undelivered Messages

If there is a problem with text message delivery, Cadence will display an alert indicating that a delivery issue has occurred:

Clicking on Not delivered will show details on the delivery issue. Typically, delivery issues are related to invalid/disconnected mobile numbers or a landline number listed as a mobile number on a student's record. 

Note: To reduce and avoid the occurrence of delivery errors, you can enable the Phone Number Validation service.


Here is a list of possible issues that could cause delivery problems:

Code Error Message
21211 Mobile number does not appear to be valid.
21217 Mobile number does not appear to be valid.
21408 The region this mobile belongs to has not been enabled.  Please contact support.
21610 This mobile number has been placed on an opt out list at our SMS gateway.  Please contact support.
21614 Mobile number does not appear to be valid. It's likely this number is invalid or is a landline.
30001 Rate limits exceeded.  Please attempt message again.
30002 Please contact support.
30003 Mobile handset is powered off or otherwise unavailable.
30004 Destination number is blocked from message receipt - possible blacklisting.
30005 Destination number is unknown and may not exist.
30006 Destination number is unreachable.  It's likely this number is for a landline or unknown carrier.
30007 Message content was flagged as a carrier violation.  Please contact support.
30008 An unknown delivery error has occurred.  It is possible this number is for a landline or unknown carrier.
30009 Please contact support.    
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