In at least one example, such metadata can be appended to the individual messages when they are received by the server(s) 102. That is, in such an example, an originating source can generate and/or associate metadata with a message prior to sending it to the server(s) 102. In at least one example, metadata can be generated by the server(s) 102 and associated with the message by the server(s) 102. For example, the component of the server(s) 102 can analyze content of a received message (for example, using natural language processing, image recognition, etc.) and/or metadata associated with the received message at the time of receipt, etc. to determine additional metadata associated with the message using rule(s), indicator(s) associated with received messages, and/or machine-trained model(s). In some examples, metadata associated with a message can be generated in part by the originating source and in part by the server(s) 102.
In some examples, the metadata can be used for determining how to present a message in the user interface 200. For example, metadata can cause messages to be presented with different presentation characteristics (e.g., size, font, color, animation, in a message digest (or not), etc.). In some examples, metadata associated with a message can be used for annotating the user interface 200, searching, filtering, and/or triggering workflows. In some examples, metadata associated with messages can trigger functions, as described above, and/or be used for managing data loss protection.