If you need to remove the contact "listmgr@plaympe.com" from your address book, follow the steps below based on your email server.
In the left pane, click on Personal Address Book.
Search for listmgr@plaympe.com in the contact list.
Select the contact and press the Delete key on your keyboard, or right-click and choose Delete from the context menu.
Navigate to the Home tab and click on Address Book.
In the list of contacts, locate listmgr@plaympe.com.
Right-click on the contact entry and select Delete.
Confirm the deletion by clicking Yes when prompted.
Once you’ve completed these steps, the contact will be removed from your address book. If you have any further questions or need assistance, feel free to reach out!