Outage in Slack

Delay in Email Delivery

Resolved Minor
August 07, 2025 - Started 4 months ago - Lasted about 21 hours
Official incident page

Incident Report

We're investigating an issue where some users are experiencing delays in receiving emails, including those related to logging in. These emails are reportedly taking up to several hours to arrive. We'll provide another update as soon as we have more news to share. We apologize for the trouble in the meantime.

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Latest Updates ( sorted recent to last )
4 months ago - at 08/08/2025 12:47AM

We’ve begun partnering with an upstream provider to help with our investigation and are waiting on additional details from their analysis. Emails are still reaching end users, but some may still be delayed. We’ll be back with another update as soon as we receive more information from our partners.

4 months ago - at 08/07/2025 10:11PM

Our investigation into the email delivery delays is still ongoing. However, we've determined that this is primarily affecting users with @outlook.com, @hotmail.com, or similar email addresses. We'll  keep you posted as soon we have an update.

4 months ago - at 08/07/2025 09:38PM

We're investigating an issue where some users are experiencing delays in receiving emails, including those related to logging in. These emails are reportedly taking up to several hours to arrive. We'll provide another update as soon as we have more news to share. We apologize for the trouble in the meantime.

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