Tuesday February 24, 2026

This issue is now resolved.

Current status and recent actions taken: Further investigation of this issue has determined that Slack systems and services are operating within specifications and remain stable.  

Scope: Some users may have experienced issues accessing Direct Messages or Multi-person Direct Messages.

Required resolution steps: No additional steps are required. 

We apologize for any inconvenience this brought to your day.

11:19 AM PST

Users should now be able to add people to group direct messages and send messages. We continue to monitor the service closely to ensure ongoing stability. We’ll provide another update if there are any changes. Thank you for your patience.

7:24 AM PST

Increased load on a messaging-related service has been identified as the cause of the issue. We have reduced the load, and are working to restore full messaging functionality. Additional capacity has also been added to prevent further impact.

We’re actively monitoring performance and continuing to work to ensure full recovery. We’ll provide another update as soon as possible. Thank you for your patience and understanding.

7:04 AM PST

We're aware of an issue impacting direct message functionality. Users are unable to add people to multi-person direct messages, and some users are experiencing errors when attempting to send messages.  We're investigating the cause and will update you as soon as we have more information.

6:36 AM PST

Our work on this issue has concluded.

• We’ve tested and validated the fix deployment, and can see previously impacted accounts now receiving emails, as intended.
• The incident has been resolved as of 04:40 UTC, February 25

This is the final update for this incident. We apologize for any inconvenience to our users for this issue. 

8:52 PM PST

Our work on this issue continues.

• The fix deployment across all production infrastructure is expected to take a further 30 minutes. 
• Initial testing shows that email delivery functionality working as expected following configuration changes on impacted accounts. 

We’ll provide a final update once full deployment and validation has been completed.

8:38 PM PST

Our work on this issue continues.

• We've ‌further identified that the cause relates to a missing data field in our email validation system, which has been causing messages to be incorrectly blocked. 
• We’ve developed and deployed a fix that is currently being rolled out across our infrastructure. 
• We expect the fix to be fully deployed within the hour, when testing and validation will begin.
• The fix is expected to restore email services to all impacted users.  

We'll provide an update once the deployment is complete and we've confirmed service restoration.

7:26 PM PST

Our work on this issue continues.

• Our investigation has identified that emails are being blocked by a suppression list subtype where our internal suppression checks aren't aligning for certain accounts. Even when affected addresses are added to our Allow List, the issue persists.
• We can confirm that this issue is not a global suppression issue, and the issue relates only to those emails affected by the suppression list subtype identified.
• We’re actively working to identify which sending accounts are not being accurately covered by these suppression checks, and to implement a fix that will restore email delivery for our affected users.

We'll be back with another update once we have news to share.

6:33 PM PST

Our work on this issue is still ongoing.

• We have seen that some emails that are not designated as ‘blocked’ are automatically being blocked. This issue persists even when these email addresses are added to specific Allow Lists. 
• Our priority is to fully understand the technical issue behind email delivery, to enable us to restore service to customers as quickly as possible. 

We'll be back with another update once we have news to share.

5:17 PM PST

We're aware of an issue where some users are unable to receive email confirmation codes and invites from Slack. As a result, these users cannot complete email login processes or accept invitations. We are currently investigating the cause. We’re actively working on multiple resolution paths. 

We'll provide an update in 60 minutes or sooner if additional information becomes available.

4:26 PM PST