Alert emails are specific to users and only apply to wallets to which they have access. The alerts can be set by the users themselves or by the master admin, controller, or manager users on behalf of standard users. 

Find the "Email Alert" tab under the settings cog.  

Shown below is the list of email alerts. Alerts can be turned on or off for each user. 

Select the regional user and wallet ID.  Email Alerts would be set per user for each wallet they have access to.