The user self-service query is located in the message navigation in the lower left corner of the mailbox and is a practical daily function. It provides sent mail query, received mail query, deleted mail query, and login status query (if you have purchased the file transfer portal value-added function, there is also a transfer portal download status query). It allows users to understand the status of mail delivery and system login in the past seven days in real time, so that users can personally manage and familiarize themselves with the working situation of their own mail system, making it more user-friendly.

Yes. To ensure the security of your mailbox, you can click the "Login Query" in the user self-service query in the upper left corner of the Webmail interface. You can view the IP address, specific time, and login result of logins to your mailbox within seven days.

You can click the Webmail self-service query "Sent Items Query" to check. If the recipient is not a user on the same system, you can only check if the email has been delivered to their mailbox. If the recipient is a user on the same system, you can also see if they have read the email.