After logging in, click My Meituan in the menu bar on the upper right to pop up a drop-down menu and select account settings, as shown in the figure below.
Click the account setting option in the drop-down menu to enter the personal account setting interface. Scroll down the interface with the mouse, and you can see the security center option at the bottom of the left menu bar, as shown in the figure below.
Click Security Center to enter the interface of Security Center, and you can see the mail subscription option on the upper right, as shown in the red box below.
Click the mail subscription option to see the setting options of the mail, whether it is hidden or deep. You can change the frequency of sending messages through this option, or you can directly choose to refuse to receive any messages. As shown in the figure below.