Tuesday November 9, 2021


Outbound emails are failing to send

Issue summary:
From November 9th, 2021 from around 3:00 p.m. PST to 7:32 p.m. PST, some customers experienced trouble with uploading/downloading files or receiving emails including invites, notifications, and confirmation codes.

This was due to our internal storage systems experiencing disruption and elevated error rates. Service was restored when our storage system recovered, resolving the issue for all affected customers.

4:42 AM PST

Outbound emails should now be sending as normal. Additionally, customers should no longer have any trouble uploading or downloading files.

If you're still experiencing any issues, please let us know at feedback@slack.com

9:04 PM PST

We're still monitoring the situation and will post updates as they become available.

6:00 PM PST

Thanks again for your patience as we continue to investigate outbound email and file download failures.

5:29 PM PST

Our investigation is ongoing. We'll be back with another update in 30 minutes.

4:52 PM PST

We appreciate your patience while we continue to address these issues.

We're also continuing to investigate file download failures, although this is only expected to impact a small number of users.

4:22 PM PST

We are still working to address the issues with outbound email failures.
A small number of file downloads may be failing, this remains part of our investigation.

3:50 PM PST

We are continuing to look into reports of outbound email failures. If you're awaiting a confirmation code for login, manually signing in with email address and password will work in the interim.

We're also monitoring issues with downloading files.

3:21 PM PST

We're investigating failures in sending outbound emails including invitations, confirmation codes for workspace creation, email notifications.

2:51 PM PST

Services affected



Workspace/Org Administration