We are continuing to monitor delivery of emails to Microsoft domains. Whilst we have seen some improvement and many emails are getting through, there is unfortunately continues to be a proportion of emails not being delivered successfully.

We'll share an update as soon as we have more information.

Delivery to Microsoft domains (Outlook, Hotmail, Live) has improved since last Friday. Some sending IPs are still seeing delays, so you may notice slower delivery to Microsoft addresses on some campaigns while this resolves or elevated soft bounces.

This remains a receiver-side issue on Microsoft's end and is not related to your account, your sending, or our platform. We've been in contact with Microsoft and are continuing to monitor closely as delivery recovers.

Thanks for your continued patience.

Delivery to Microsoft domains has improved significantly, though we're still seeing fluctuations in successful delivery rates. We're continuing to monitor closely and make adjustments to mitigate the impact where we can.

This remains a receiver-side issue on Microsoft's end and is not related to your account, your sending, or our platform. We've been in contact with Microsoft and are continuing to monitor closely as delivery recovers.

In the meantime, we recommend holding off on resending campaigns to Microsoft-domain subscribers that have bounced until the issue is fully resolved.

We are still seeing fluctuations in successful delivery rates to Microsoft domains. We're continuing to monitor closely and make adjustments to mitigate the impact where we can.

This remains a receiver-side issue on Microsoft's end and is not related to your account, your sending, or our platform. 

If possible, we recommend holding off on resending campaigns to Microsoft-domain subscribers that have bounced until the issue is fully resolved.

We know this issue has now been ongoing for an extended period, and we appreciate your patience while it continues to affect email delivery to Microsoft domains.

To be clear, this remains a receiver-side issue on Microsoft's end — it is not related to your account, your sending, or our platform. Our deliverability team continue to be in contact with Microsoft as they work through this on their side.

In terms of current state: bounce volumes related to this issue have continued to decline over the past week, and are currently at their lowest point since the issue began. That said, rates are still fluctuating, and some customers may continue to experience bounces to Microsoft domains intermittently. We are not yet in a position to mark this issue as resolved, and we're continuing to monitor closely as delivery recovers further.

We will be undergoing scheduled maintenance on Sunday, 2026-08-09 at 04:00 AM UTC (see your timezone here). The maintenance is expected to last approximately 2 hours.

Customers may experience interruptions when logged into their account. Emails scheduled to be sent may be delayed.

We encourage you to share this information with any additional users of your account who may not see this message.

To be notified of future status and maintenance updates, please subscribe.

The maintenance task is now done and we are currently verifying that everything is working as expected before resolving the status page. Thanks for your patience.

To be notified of future status and maintenance updates, please subscribe.

We have completed our scheduled maintenance. Emails that were queued to send during the maintenance window may have been delayed. Users may temporarily see some residual slowness in the app.

To be notified of future status and maintenance updates, please subscribe.

It is not possible to login to Campaign Monitor at this time, our team are aware of the cause and are working to have this sorted as soon as possible.

Our engineering team continues to investigate the issue and is working to resolve it as quickly as possible. While the application is currently unavailable, this does not affect emails that have already been sent — links and images within those emails will continue to work as expected.

Our team has resolved the issue, and the application is now operating as normal.

We will continue to monitor the situation closely and will update the status page with any further information.

The application is now working normally and customers can now login without any issues.

Any campaigns scheduled to send during the period the application was unavailable will now send.

Unfortunately, Transactional emails that were triggered during this period won't have been sent and will need to be re-triggered.

We will be undergoing scheduled maintenance on Sunday, May 3, 2026 4:00 am UTC (see your timezone here). The maintenance is expected to last approximately 1 hour.

Emails scheduled to send during the maintenance may be delayed and customers may experience interruptions when logged into their account during maintenance.

We encourage you to share this information with any additional users of your account who may not see this message.

To be notified of future status and maintenance updates, please subscribe.

The maintenance task is now done and we are currently verifying that everything is working as expected before resolving the status page. Thanks for your patience.

To be notified of future status and maintenance updates, please subscribe.

We have completed our scheduled maintenance. Emails that were queued to send during the maintenance window may have been delayed. Users may temporarily see some residual slowness in the app.

To be notified of future status and maintenance updates, please subscribe.

We will be undergoing scheduled maintenance on Sunday, 1st February 2026 at 04:00 AM UTC ( see your timezone here ). The maintenance is expected to last approximately 2 hours.

Emails scheduled to send during the maintenance may be delayed and customers may experience interruptions when logged into their account during maintenance.

We encourage you to share this information with any additional users of your account who may not see this message.

To be notified of future status and maintenance updates, please subscribe.

The maintenance task is now done and we are currently verifying that everything is working as expected before resolving the status page. Thanks for your patience.

To be notified of future status and maintenance updates, please subscribe.

The maintenance task is now done and we are currently verifying that everything is working as expected before resolving the status page. Thanks for your patience.

To be notified of future status and maintenance updates, please subscribe. 

We have completed our scheduled maintenance. Emails that were queued to send during the maintenance window may have been delayed. Users may temporarily see some residual slowness in the app.

To be notified of future status and maintenance updates, please subscribe.

We are aware that some customers are experiencing access issues with CM. We are currently investigating and will keep you updated.

The incident has now been resolved. Customers should no longer experience the access issue.

We will be undergoing scheduled maintenance on Sunday, Oct 19, 2025 at 4:00 AM UTC (see your timezone here). The maintenance is expected to last approximately 2 hours.

During this time, email sends may be delayed, and users may experience temporary interruptions when accessing their accounts.

We encourage you to share this information with any additional users on your account who may not see this message.

To stay informed about future maintenance and status updates, please subscribe here  https:// status .campaignmonitor.com/

The maintenance task is now done and we are currently verifying that everything is working as expected before resolving the status page. Thanks for your patience.

To be notified of future status and maintenance updates, please subscribe here  https:// status .campaignmonitor.com/

We have completed our scheduled maintenance. Emails that were queued to send during the maintenance window may have been delayed. To be notified of future status and maintenance updates, please subscribe here https:// status .campaignmonitor.com/

We will be undergoing scheduled maintenance on Sunday, 13 Jul 2025 at 04:00 AM UTC (see your timezone here). The maintenance is expected to last approximately 2 hours.

Emails scheduled to send during the maintenance may be delayed and customers may experience interruptions when logged into their account during maintenance.

We encourage you to share this information with any additional users of your account who may not see this message.

To be notified of future status and maintenance updates, please subscribe.

The maintenance task is now done and we are currently verifying that everything is working as expected before resolving the status page. Thanks for your patience.

To be notified of future status and maintenance updates, please subscribe.

We will be undergoing scheduled maintenance on Sunday, 13 April 2025 at 04:00 AM UTC (see your timezone here). The maintenance is expected to last approximately 1 hour.

Customers may experience interruptions when logged into their account. Emails scheduled to send may be delayed. Segments will be unavailable.

We encourage you to share this information with any additional users of your account who may not see this message.

To be notified of future status and maintenance updates, please subscribe.

The maintenance task is now done and we are currently verifying that everything is working as expected before resolving the status page. Thanks for your patience.To be notified of future status and maintenance updates, please subscribe.

We have completed our scheduled maintenance. Emails that were queued to send during the maintenance window may have been delayed. Users may temporarily see some residual slowness in the app. To be notified of future status and maintenance updates, please subscribe.

We will be undergoing scheduled maintenance on Sunday, 19 January 2025 at 04:00 AM UTC (see your timezone here). The maintenance is expected to last approximately 2 hours.

Emails scheduled to send during the maintenance may be delayed. Engagement segments processing will be delayed. Customers may experience interruptions when logged into their account.

We encourage you to share this information with any additional users of your account who may not see this message.

To be notified of future status and maintenance updates, please subscribe.

The maintenance task is now done and we are currently verifying that everything is working as expected before resolving the status page. Thanks for your patience.

To be notified of future status and maintenance updates, please subscribe.

We have completed our scheduled maintenance. Emails that were queued to send during the maintenance window may have been delayed. Users may temporarily see some residual slowness in the app.

To be notified of future status and maintenance updates, please subscribe.