Campaignmonitor Outage History
45 incidents recorded over the last 365 days, 44 of them resolved. Durations are measured from when PulsAPI first saw the problem to when it cleared, which is usually longer than the vendor's own figure.
Every Recorded Campaignmonitor Incident
| Date | Incident | Duration | Status |
|---|---|---|---|
| Nov 8, 2026 | Scheduled MaintenanceWe will be undergoing scheduled maintenance on Sunday, Nov 8, 2026 4:00 am UTC (see your timezone here). The maintenance is expected to last approximately 2 hours. Customers may experience interruptions when logged into… | — | Scheduled |
| Sep 21, 2026 | Microsoft delivery delays — customer update<p>We're closing out this issue as our deliverability team has confirmed that bounce rates to Microsoft domains have stabilized within a normal, expected range, and we are no longer seeing the elevated bounce… | 0 min | Resolved |
| Sep 18, 2026 | Microsoft delivery delays — customer update<p>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.</p><p></p><p>To be… | 76h 18m | Resolved |
| Sep 16, 2026 | Microsoft delivery delays — customer update<p dir="ltr" style="font-family: Muli, Poppins">We are still seeing fluctuations in successful delivery rates to Microsoft domains. We're continuing to monitor closely and make adjustments… | 119h 59m | Resolved |
| Sep 11, 2026 | Microsoft delivery delays — customer update<p dir="ltr">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… | 245h 38m | Resolved |
| Sep 7, 2026 | Microsoft delivery delays — customer update<p>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… | 339h 37m | Resolved |
| Sep 4, 2026 | Microsoft delivery delays — customer update<p>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… | 407h 39m | Resolved |
| Sep 4, 2026 | Microsoft delivery delays — customer updateWe're closing out this issue as our deliverability team has confirmed that bounce rates to Microsoft domains have stabilized within a normal, expected range, and we are no longer seeing the elevated bounce volumes… | 409h 41m | Resolved |
| Aug 9, 2026 | Scheduled Maintenance<p>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… | 0 min | Resolved |
| Aug 9, 2026 | Scheduled Maintenance<p>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… | 12 min | Resolved |
| Aug 9, 2026 | Scheduled MaintenanceWe 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… | 1h 10m | Resolved |
| Jul 16, 2026 | Customers are unable to login to accounts<p>The application is now working normally and customers can now login without any issues.<br><br>Any campaigns scheduled to send during the period the application was unavailable will now… | 0 min | Resolved |
| Jul 16, 2026 | Customers are unable to login to accounts<p class="font-claude-response-body break-words whitespace-normal">Our team has resolved the issue, and the application is now operating as normal.</p><p>
</p><p… | 14 min | Resolved |
| Jul 16, 2026 | Customers are unable to login to accounts<p>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… | 36 min | Resolved |
| Jul 16, 2026 | Customers are unable to login to accountsThe 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… | 1h 9m | Resolved |
| Jun 22, 2026 | Issues affecting sign up forms<p>The incident has now been resolved. Customers should no longer experience issues with sign up forms.</p> | 0 min | Resolved |
| Jun 22, 2026 | Issues affecting sign up forms<p>A fix has been implemented, and we are currently verifying that all functionality is working as expected before resolving this incident.</p><p><span style="font-size… | 16 min | Resolved |
| Jun 22, 2026 | Issues affecting sign up formsThe incident has now been resolved. Customers should no longer experience issues with sign up forms. | 2h 24m | Resolved |
| May 3, 2026 | Scheduled Maintenance<p>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… | 0 min | Resolved |
| May 3, 2026 | Scheduled Maintenance<p>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.</p><p>To be notified of future… | 13 min | Resolved |
| May 3, 2026 | Scheduled MaintenanceWe 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… | 37 min | Resolved |
| Apr 2, 2026 | Problems accessing SMS Sending and Settings<p>The incident has now been resolved. Customers should no longer experience problems accessing SMS Settings or sending SMS campaigns.</p> | 0 min | Resolved |
| Apr 1, 2026 | Problems accessing SMS Sending and SettingsThe incident has now been resolved. Customers should no longer experience problems accessing SMS Settings or sending SMS campaigns. | 19h 20m | Resolved |
| Mar 4, 2026 | Delays importing subscribers<p>This issue has now been resolved and there are no longer any delays importing subscribers.</p> | 0 min | Resolved |
| Mar 4, 2026 | Delays importing subscribers<p>This issue has now been resolved and there are no longer any delays importing subscribers.</p> | 1 min | Resolved |
| Mar 4, 2026 | Delays importing subscribers<p>Our engineering team have identified the cause and are now processing the backlog of imports, we currently expect this to be complete in approximately 30 minutes.</p> | 39 min | Resolved |
| Mar 4, 2026 | Delays importing subscribersThis issue has now been resolved and there are no longer any delays importing subscribers. | 54 min | Resolved |
| Mar 3, 2026 | Subscriber imports are delayed<p>Our engineering team have been able to resolve the issue and imports are now processing normally.</p> | 0 min | Resolved |
| Mar 3, 2026 | Subscriber imports are delayedOur engineering team have been able to resolve the issue and imports are now processing normally. | 1h 52m | Resolved |
| Feb 19, 2026 | Automated Journeys not triggeringThe incident has now been resolved. Customers should no longer experience delayed automated journey triggers. | 0 min | Resolved |
| Feb 19, 2026 | Automated Journeys not triggeringA fix has been implemented and we are verifying that everything is working as expected before resolving the status page. Customers should no longer experience delays in triggering journeys, though we are monitoring… | 13 min | Resolved |
| Feb 19, 2026 | Automated Journeys not triggering<p>We are continuing to work on a fix and will provide further updates. Customers may currently experience delays in automated journey emails being sent.</p> | 1h 27m | Resolved |
| Feb 19, 2026 | Automated Journeys not triggering<p><span style="color: rgba(0, 0, 0, 1)">We are continuing to work on a fix and will provide further updates. Customers may currently experience delays in automated journey emails being… | 7h 39m | Resolved |
| Feb 19, 2026 | Automated Journeys not triggeringThe incident has now been resolved. Customers should no longer experience delayed automated journey triggers. | 8h 38m | Resolved |
| Feb 17, 2026 | Scheduled maintenance: Support access & Help center<p style="font-family: Muli, Poppins; color: rgba(0, 0, 0, 1)">We have completed the scheduled maintenance of our help center and support environment.</p><p style="font-family: Muli… | 0 min | Resolved |
| Feb 13, 2026 | Scheduled maintenance: Support access & Help centerWe have completed the scheduled maintenance of our help center and support environment. To be notified of future status and maintenance updates, please subscribe. | 87h 0m | Resolved |
| Feb 1, 2026 | Scheduled Maintenance<p style="color: rgba(0, 0, 0, 1)"><span>We have completed our scheduled maintenance. Emails that were queued to send during the maintenance window may have been delayed. Users may temporarily see… | 0 min | Resolved |
| Feb 1, 2026 | Scheduled Maintenance<p style="color: rgba(0, 0, 0, 1)"><span>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… | 51 min | Resolved |
| Feb 1, 2026 | Scheduled Maintenance<p style="color: rgba(0, 0, 0, 1)"><span>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… | 54 min | Resolved |
| Feb 1, 2026 | Scheduled MaintenanceWe 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… | 1h 18m | Resolved |
| Jan 19, 2026 | Issues accessing CM account<p>The incident has now been resolved. Customers should no longer experience the access issue.</p> | 0 min | Resolved |
| Jan 19, 2026 | Issues accessing CM accountThe incident has now been resolved. Customers should no longer experience the access issue. | 20 min | Resolved |
| Nov 7, 2025 | Issues importing subscribers<p><span style="font-family: Muli, Poppins;">The incident has now been resolved. Customers should no longer experience issues importing subscribers.</span></p> | 0 min | Resolved |
| Nov 7, 2025 | Issues importing subscribers<p><span style="font-family: Muli, Poppins;">Imports have caught up and we are verifying that everything is working as expected before resolving the status page. Customers should no longer… | 11 min | Resolved |
| Nov 7, 2025 | Issues importing subscribersThe incident has now been resolved. Customers should no longer experience issues importing subscribers. | 39 min | Resolved |
Hear about the next one while it is open
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How to Read This Campaignmonitor Incident Log
Each row is an incident PulsAPI observed, not a summary written afterwards. The duration is wall-clock time between the first failing check and the first clean one, so it includes the window before Campaignmonitor acknowledged anything. Vendor post-mortems typically measure from acknowledgement, which is why their numbers are usually shorter.
Incidents still open have no duration yet and are listed as ongoing rather than being given a running total. The archive covers the last 365 days; anything older has aged out of the window rather than never having happened.
The longest single Campaignmonitor outage in this window ran 17d 1h, against a mean recovery of 1d 15h. If you depend on Campaignmonitor in a customer-facing path, the longest figure is the one to design around. The mean is what happens on a normal bad day; the maximum is what happens on the worst one.