Techniques for text message transmission are described herein. These techniques may include collecting multiple user IDs for electronic commerce. Using the user IDs, a server transmits a text message to multiple clients, and obtains activities of particular clients of the multiple clients in response to the text message to determine particular user IDs associated with the particular clients. Based on the obtained activities, the server generates and/or updates a graylist that includes one or more user IDs of the multiple user IDs different from the particular user IDs.