May 8, 2025
.
5 Min
If you have been using WhatsApp Business API for marketing campaigns, and suddenly find that your messages are not reaching users, you are not alone. Many businesses have been receiving Error Code 131026, which signals a “message undeliverable” issue. In this blog, we will explain why this is happening and suggest an effective alternative – RCS Messaging.
Recently, WhatsApp introduced a policy aimed at improving user experience by limiting the number of marketing messages users receive from businesses. This change is intended to reduce spammy or irrelevant messages and ensure that users only get the most meaningful content.
The error code 131026, commonly among businesses using WhatsApp Cloud API, indicates that your marketing message has not been delivered due to these new limitations. This error primarily affects marketing templates and new conversation initiations but does not impact ongoing, live conversations with users.
131026 (Message Undeliverable)
Unable to deliver message. Reasons can include:
Android: 2.21.15.15
SMBA: 2.21.15.15
iOS: 2.21.170.4
SMBI: 2.21.170.4
KaiOS: 2.2130.10
Web: 2.2132.6
Using a non-WhatsApp communication method, ask the WhatsApp user to:
WhatsApp now blocks marketing template messages that are less likely to be read by the recipient. If a user has been flooded with marketing content from various businesses, WhatsApp may reject additional messages to avoid overwhelming recipients. This policy was rolled out in India in early 2024 and is gradually being implemented globally.
While this move helps improve user engagement, it leaves businesses with the challenge of ensuring their marketing campaigns continue to reach their audience effectively. Monitoring the performance of these messages has become critical, and businesses need to adapt their strategies.
To help businesses navigate this change, WhatsApp Business API provides real-time analytics that allow you to track the performance of your campaigns. If you notice that a large number of your messages are not being delivered due to this policy, you can take swift action. One option is to run a follow-up campaign through an alternative platform like RCS (Rich Communication Services).
RCS offers many benefits similar to WhatsApp but with fewer restrictions. If you see that a significant number of users did not receive your WhatsApp marketing message, you can easily retarget them using RCS. Here are some reasons why RCS can be an effective alternative:
At GreenAds Global, we go beyond just delivering your messages and offer a robust failover mechanism for maximum reach. If due to the policy limitations or delivery issues, your WhatsApp message is not delivered to some of your recipients, then our system allows you to filter those recipients and seamlessly retarget them by automatically switching over to an alternate platform like RCS. This automated flow is important for the optimization of your marketing campaigns-never letting a chance go without being taken. Using our powerful tools and expertise, you can communicate confidently with your audience when barriers pop up.
As WhatsApp continues to optimize its platform to protect users from marketing overload, businesses must stay agile. Tracking real-time analytics is key to identifying when messages are failing and adjusting your strategy accordingly. RCS provides an excellent alternative for businesses facing high WhatsApp message failure rates, offering another way to engage with your audience without hitting the same restrictions.
By blending WhatsApp and RCS in your communication strategy, you will be able to keep your campaigns running smoothly and ensure your message gets through to the right people.
Have questions? We have got answers! Connect with our product expert for a personalized demo session and discover the best messaging solutions for your business.