Policy overview

Available in Classic and VPC

You can review the policies that must be checked before sending SMS messages.

Sending international SMS

Before sending an international SMS, confirm the international SMS pricing information and sender number policy by country.

International SMS pricing information

The international SMS pricing information is as follows:

• International SMS charges are applied based on the number of successfully sent messages. A successful send means that the sending request has been successfully delivered to the overseas carrier via the aggregator.
• Even an international SMS that was sent successfully may not be received in a terminal due to the network of the recipient and conditions of the terminal. Even if a successfully sent international SMS is not actually received by the recipient, charges may still apply.
• Identifying the cause of non-delivery through overseas carriers may take some time, and in some cases, the exact cause may not be determined.
• Overseas carriers generally retain delivery logs for only up to 7 days, so depending on the inquiry timing, it may be difficult to verify the cause of non-delivery.
• When sending long SMS messages, they may be split into multiple SMS messages depending on the recipient's carrier. In such cases, charges may be applied based on the number of split messages.

Sender number policy by country for international SMS

The supported countries for the international SMS service and the sender number policies by country are as follows:

Prohibition of sender number spoofing

In accordance with the Telecommunications Business Act, the sender number pre-registration system has been in effect since October 16, 2015. The sender number pre-registration system, based on Article 84 of the Telecommunications Business Act, is a system that allows SMS messages to be sent only from pre-registered sender numbers in order to prevent user damage caused by falsely displayed phone numbers.
Therefore, to send SMS messages, you must register a phone number owned by your company or by yourself, and if Korea Internet and Security Agency (KISA) requests supporting documents due to suspected sender number spoofing, they must be submitted within 3 days.

Mandatory display of 080 opt-out number

In accordance with the reinforced Act on Promotion of Information and Communications Network Utilization and Information Protection (Article 50) for the prevention of illegal spam, when sending advertising text messages, measures must be taken to ensure that recipients can withdraw their consent to receive messages or opt out free of charge. In addition, advertising messages must clearly state that recipients will not incur any charges when opting out or withdrawing their consent.
Example: Free opt-out: 080-1234-5678

If this requirement is violated, an administrative fine of up to KRW 30 million may be imposed in accordance with the Act on Promotion of Information and Communications Network Utilization and Information Protection. (Go to Korea Internet and Security Agency.)