Clients:Emails/Notes/Logs Tabs
From WHMCS Documentation
Emails tab
The Emails tab lists the emails that WHMCS has sent to a client.
For more information, see Clients:Emails Tab.
Notes tab
The Notes tab displays private notes that admins have added for the client.
For more information, see Clients:Notes Tab.
Log tab
The Logs tab provides a detailed overview of the client's history within WHMCS.
For more information, see Clients:Log Tab.