Notes and Constraints

SMN pushes messages asynchronously, which does not ensure the timeliness of message delivery. If your service requires messages need to be delivered in a quasi-real-time manner, exercise caution whether to use SMN.

Quotas specify the maximum number of SMN resources you can create. To view or increase the quota, see Quotas.

The source IP address used by SMN to send messages is not fixed and may be changed at any time. Do not configure a whitelist for source IP addresses, or you may fail to receive SMN messages.

For network security purposes, SMN does not send messages through private networks by default. If you use a Huawei Cloud private IP address to receive SMN messages, contact SMN O&M personnel to configure resolution records for the private IP address and configure firewalls in advance.