The logout URL setting allows you to specify a URL that starts with http:// or https:// that users are redirected to after they have logged out of Salesforce. If the logout URL is not specified, the user is redirected to https://login.salesforce.com. If My Domain is enabled and the logout URL is not specified, users are redirected to https://my-domain.my.salesforce.com.
The New User Email section is discussed in the following section.