Teachable incident
Email Deliverability Issues to Yahoo Addresses
Teachable experienced a major incident on December 3, 2025, lasting 14d 3h. The incident has been resolved; the full update timeline is below.
Update timeline
- investigating Dec 03, 2025, 03:46 PM UTC
We are currently investigating issues affecting email deliverability to Yahoo-based email addresses. This may impact all email types except OTP login codes, which continue to function normally. Our team is working to identify the root cause and will provide updates as soon as more information is available. Thank you for your patience while we work to resolve this.
- monitoring Dec 03, 2025, 11:21 PM UTC
We're continuing to monitor email deliverability to Yahoo-based addresses. While some messages are now being delivered successfully, intermittent failures are still occurring. We're actively working with our email provider to confirm full recovery and understand the remaining delays. These types of issues can take some time to fully stabilize, which is consistent with similar situations we've seen in the past. We'll continue to monitor closely and will share another update in the morning. Thank you for your understanding while we get this fully resolved.
- monitoring Dec 04, 2025, 06:25 PM UTC
Our team continues to work closely with our email provider to fully resolve the remaining intermittent delivery failures. While we've seen continued improvement in delivery rates since yesterday, we're not yet at the full resolution. We'll continue our close monitoring throughout the day and will share updates as we have more information. Thank you for your continued patience as we work to get this fully resolved.
- resolved Dec 17, 2025, 07:40 PM UTC
This issue is resolved