Internal Errors

There are a few errors that are generated by our internal system while sending SMS & RCS Messages:

Error	Description
Personalization Failed	Occurs when Message Personalization fails and No Fallback message is set. The system will not send the message to the user and will generate the Personalization Failed error.
Invalid Mobile Number	Occurs in the following scenarios: When the Mobile number field is Empty, None, N/A, undefined, null, or 0 (zero). When the Mobile number field contains any Unicode character or the Length is less than 4. When the mobile number is not convertible to E.164 format.
Users removed due to Global Control Group	Occurs when the user is part of the Global Control group, and hence MoEngage did not send any message to the user.
Rejected because of DND	Occurs when the user qualifies for an event-triggered message during the configured DND hours. MoEngage will not send the message to the user in such a case.
Not sent due to campaign level min delay	Occurs when the user qualifies for two messages or messages from the same campaign, but the message is not sent because of minimum delay settings in the campaign.