Why do invitations to Studio arrive late to my mailbox? Updated February 05, 2019 15:27 Follow We are using Sparkpost for sending invitation emails from Studio. Please check that sparkpost.com is whitelisted in your company or private email spam filter if you do not receive invitations. Related articles The link in my Studio invitational email has expired. How can I get a new invitation? Comments 0 comments Please sign in to leave a comment.