Help Center/ Simple Message Notification/ FAQs/ What Are Most Frequently Asked Questions About Creating, Publishing, and Subscribing to a Topic in SMN?
Updated on 2025-08-19 GMT+08:00
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What Are Most Frequently Asked Questions About Creating, Publishing, and Subscribing to a Topic in SMN?

How Many Topics Can I Create?

By default, you can create 3,000 topics.

How Many Subscriptions Can Be Added to a Topic?

By default, 10,000 subscriptions can be added to a topic.

How Many Messages Can Be Published to a Topic?

There is no limit on the number of messages that can be published to a topic.

How Many Message Templates Can I Create?

By default, you can create 100 message templates.

Can I Add Subscriptions Using Multiple Protocols to a Topic?

Yes. A topic supports HTTP, HTTPS, email, and SMS subscriptions.

Can a Topic Creator Change Subscription Protocols in a Topic?

No. A topic creator cannot change subscription protocols after subscriptions are added to the topic.

Can I Change a Subscription Endpoint for a Topic?

No. You cannot change a subscription endpoint once it is added to a topic. If needed, you can delete the endpoint and add a new one.

Can I Delete a Published Message?

No. You cannot delete a message once it is published.

Will a Subscriber Receive the Same Message Multiple Times?

A subscriber will only receive a message once. SMN re-sends a message only when there is a network or device failure.