Loymax, 2026

4.2. SMS mass messaging

The SMS mass messaging module allows to send SMS notifications to a group of customers. 

If your SMS provider supports the Viber option, it is possible to send Viber messages or Viber -> SMS cascade.
More information about using cascades can be found below.

SMS mailing page without Viber optionSMS mailing page with activated Viber option
SMS_without_Viber.pngSMS_Viber.png

No more than one link can be used in a Viber message. The link should be specified as a value for the Link address parameter. The link text should be specified in the Button text parameter. In this case, the link in the message will be displayed as a button with the specified text.

SMS mailing parameters

Filling out the SMS mailing parameters consists of the following steps:

  1. Setting up A/B testing in the mailing, if required.
  2. Filling out the message parameters. In case of A/B testing, it is necessary to fill out several variants of the message. 
  3. Filling out the mailing settings.
Message parameters
  • Specify the Sender name;
  • Fill in the message text. You can use the Template Engine constructs in the SMS text.
  • There is an option to upload the image (if needed). Smart Communications does not have any restrictions on the image size, except for the Nginx file upload limit — 32 MB. However, Google FCM does have file size limitations. If the payload exceeds the allowed size, Firebase may respond with the ‘Message Too Big’ error for the entire request. To avoid such issues, we recommend following the guidelines below for image size in SMS mailings:
    • Image format: PNG or JPG.
    • Recommended image size: up to 300 KB.
    • Image aspect ratio: 2:1.
    • Maximum image size: 800 pixels.
    • Maximum image width: 1,000 pixels.

After filling out the message parameters, you can send a test message. To do this, click Test. In the opened window specify the phone number and click Send.

Test_message.png

Please note: when you specify your phone number for a test message, the Platform generates a message for a special test customer. This is done due to the fact that in general case the Platform’s user may not have a customer profile in the database.

Mailing settings
Settings.png

All types of settings have the same set of settings. Detailed description of mailing settings can be found in a separate article.

Cascades

Cascades or cascade mailing (chain of notifications) is the sequential sending of the same message through different communication channels.

If the SMS provider supports the Viber option, the cascade logic will be as follows:

  1. If only SMS text is provided — only the SMS will be sent.
  2. If only Viber text is provided — only the Viber message will be sent.
  3. If both SMS and Viber texts are provided, the System first attempts to deliver the Viber message. If delivery fails within 3 hours, the message is sent via SMS.

The below 3 categories of recipients do not receive Viber messages:

  • customers who do not have Viber app installed;
  • customers whose Viber was disabled on the day of the mailing;
  • customers who at some point checked the box "Unsubscribe me from mailings of this brand" (a built-in Viber feature for branded mailings).

Note: if you do not need to use the Viber option, it is recommended to fill in only the SMS text message. To disable the Viber messaging feature, please contact the technical support: support@loymax.io. 

Created by Vera Retyeva on 2025/06/04 09:03
Created 2025/06/04 09:03
Last edited 2026/01/21 04:36

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