GoCardless experienced email delivery failures to Microsoft mailboxes (Outlook, Hotmail, Live, and MSN) lasting approximately 21 days. The issue was resolved on June 15, 2026, with email deliverability fully restored and monitored for stability. Affected emails were subsequently resent with a "(Delayed Delivery)" subject line prefix to help recipients identify them.
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We have begun resending the emails that failed to deliver during the recent service disruption.
To help you easily identify these messages, (Delayed Delivery) has been added to the beginning of the subject line.
Email deliverability to Microsoft mailboxes (Outlook, Hotmail, Live, MSN, etc.) has been restored. We are actively monitoring the service to ensure continued stability
We would like to inform you that we are currently experiencing email delivery failures affecting Microsoft mailboxes, including Outlook, Hotmail, Live, and MSN (and their regional extensions). We are in contact with Microsoft regarding this issue, however they have not yet provided an estimated resolution time.
We will continue to monitor the situation and share updates as soon as they become available.
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