This feature will scan the attachment that is about to be added to find out the Type/Extension of the files. You can allow/restrict the file extensions as you please.
For instance, .EXE is one of the vital file extension which most of the customers does not wish to allow to upload due to security concern. So, this feature will help prevent from users adding files of this extension.
Allow or Restrict is done through SQL Update queries, In order to have the feature to work, please use the below queries to BLACKLIST or WHITELIST the file extensions used in the application.
WHITELIST - It allows only the specified extension.
update attachmentconfig set paramvalue='exe,eml' where parameter='FileExtensions';
BLACKLIST - It DOES NOT allow the specified extensions (in the query below) to be added in the application. You will get a message stating "File extension not allowed"
update attachmentconfig set paramvalue='BLACKLIST' where parameter='BlackList_Or_WhiteList';
update attachmentconfig set paramvalue='exe,eml' where parameter='FileExtensions';