We have been closely monitoring the SendGrid outage. Starting at 9:00AM PDT we have seen a significant percentage of emails fail when sending through SendGrid. If you would like your emails to be resent please reach out to firstname.lastname@example.org
and our support team can help out. We can resend once SendGrid has returned to normal.
More information can be found at their status page: https://status.sendgrid.com/
Customers using a different email service provider are not affected.