[Configuration Manager Setting] Number of notifications in a single email [System Setting] NotificationsPerEmail [Description] 
The maximum number of validation issues that will be listed in a single notification e-mail. Additional issues, if they exist, are not included in the e-mail. The full list of validation issues is available on the Review Validation Issues page in Master Data Manager. Note This system setting is available after you upgrade the Master Data Services database following the installation of the SQL Server 2008 R2 Master Data Services June Update from the Microsoft Support Web site.