How to stop sending emails to some selected Users?

Hello Everyone,

I don't want to send emails to few users (like Inactive users, some users left the company). there is any way or setting for stop sending email to selected user. I know we can add custom method and call before sending email from all workflow, conversion task, methods, life cycles but we don't want to update everywhere. Any one know how we can do this?

In User Item type there is a property "mail_stop" property, Any one know how its works? 

  • I never noticed the "mail_stop" property for Users, so I don't know what it will do.  Where are the e-mails coming from?  We send e-mails from Workflow Activities > Notifications.  They are set to send to All Assignments.  Our Assignments are "group" Identities.  When someone leaves, we make sure to remove them from the groups so they will not receive any e-mails.