Why is a subscribed user not receiving a specific message (like a newsletter) but still receiving other communications?

When a subscribed user doesn't receive a specific message, such as a newsletter, but continues to receive other emails or messages, it's often related to the segmentation rules configured for that specific message.

Here's why this might happen and how to check:

1. Segmentation Criteria: Newsletters and targeted campaigns are frequently sent to specific user segments defined by criteria like tags or user attributes. If the user doesn't meet these criteria at the time the message is sent, they won't receive it.
2. Check Message Segmentation: Review the setup for the specific message or campaign that wasn't delivered. Identify the required tags or attributes for the target segment.
3. Check User Profile: Examine the affected user's profile within the platform. Verify if they possess the necessary tags or attributes defined for the message's segment.
4. Timing is Key: The user must match the segment criteria when the message send is initiated. If a required tag was missing at that moment, they would be excluded from that specific send, even if the tag was added later.
5. Other Communications: The other messages the user is receiving are likely different types (e.g., transactional emails, messages from different campaigns/segments) for which they did meet the criteria, or messages sent to broader audiences without the same specific segmentation rules.