I've sent emails to collaborators informing them of their access as well as sent the collaborators requests for approval via workflow. Not all of the collaborators have received emails from Smartsheet. All the collaborators have been set up in my contacts. Is there an additional feature I need to activate for all the collaborators to get emails? Several of these folks have unique domains: Comcast.net; mail.com; me.com. Is this a problem for Smartsheet? Thanks!