Marketing Campaigns sending has been fully restored to all users at the expected performance level you can trust from our service.
Our team is working with a handful of users who need additional, account-specific resolution related to their contact databases. We are communicating individually with these customers and will continue to update them directly moving forward. We sincerely thank you for your patience. We will add a post-resolution update with a detailed Post Mortem when we have one to share. Please reach out to our Support team with any questions at https://support.sendgrid.com