Sends message content — including multilingual/Unicode content — to multiple destinations in a single API call.

Response Codes

| Code | Description | |------|-------------| | 1701 | Success. Format: 1701\|<destination>\|<message_id>. | | 1702 | Invalid URL — one of the parameters was not provided or left blank. | | 1703 | Invalid value in username or password field. | | 1704 | Invalid value in type field. | | 1705 | Invalid message. | | 1706 | Invalid destination. | | 1707 | Invalid source (sender). | | 1709 | User validation failed. Safe to retry. | | 1710 | Internal error. | | 1025 | Insufficient credit. | | 1715 | Response timeout — do not resubmit the same message. | | 1032 | DND reject. | | 1028 | Spam message. | | 1041 | Duplicate message. | | 1042 | Explicit DND destination. | | 1033 | Message template mismatch. |