Unusual Location Login
To protect email password, we have developed a unusual location login system. When the IP not in the main user address range, we will send an email notification letter, advising clients to contact your email administrator change the password immediately. 
The email notification letter received by the client is as follows:
If you don't want to receive a unusual location login email notification, you can contact the mail administrator at the management system's domain edit page to close unusual location login, the following is the operation screenshot: