Sunday June 2, 2019

Issue Summary:

On June 2, 2019 from 12:53 p.m. PDT to 4:00 p.m. PDT, a network congestion issue affected one of our email services. At 1:29 p.m., we started to receive reports from customers that emails were not arriving and launched an internal investigation. Once we established the issue was with an external provider, we monitored the situation until the issue was resolved. We called the all clear at 5:11 p.m. PDT after customers confirmed emails were arriving as expected again.

6:15 PM PST

We've received confirmation that email services have been restored. If you were unable to send or receive a Slack-related email during this time, please try again now. Thanks for bearing with us.

5:24 PM PST

We have received reports of workspace/account creation and email invitation emails failing to deliver, and believe the issue is associated with an email provider outage. We apologize if you're affected. We'll update here as soon as we have more information.

4:02 PM PST