SendGrid incident: SMS Delivery Delays and Delivery Receipt Delays from Twilio to Chunghwa Telecom Taiwan

Affected components

• SMS, APAC

1. resolvedOct 6, 2026, 15:02 UTC

   The incident has been resolved and SMS delivery and delivery receipts from Twilio to Chunghwa Telecom network subscribers in Taiwan are operating normally.

2. monitoringOct 6, 2026, 13:16 UTC

   We have observed a recovery in SMS delivery and delivery receipts from Twilio to Chunghwa Telecom network subscribers in Taiwan and are monitoring service stability. We will provide another update in 4 hours or as soon as more information becomes available.

3. monitoringOct 6, 2026, 11:13 UTC

   We have observed a recovery in SMS delivery and delivery receipts from Twilio to Chunghwa Telecom network subscribers in Taiwan and are monitoring service stability. We will provide another update in 2 hours or as soon as more information becomes available.

4. identifiedOct 6, 2026, 10:42 UTC

   Twilio customers may be experiencing SMS delivery delays and SMS delivery receipt delays from Twilio to Chunghwa Telecom network subscribers in Taiwan. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 2 hours or as soon as more information becomes available.

5. identifiedOct 6, 2026, 09:39 UTC

   Twilio customers may be experiencing SMS delivery delays and SMS delivery receipt delays from Twilio to Chunghwa Telecom network subscribers in Taiwan. Our team has identified the cause, and is working to resolve the issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 1 hour or as soon as more information becomes available.

6. investigatingOct 6, 2026, 09:33 UTC

   Twilio customers may be experiencing SMS delivery delays and SMS delivery receipt delays from Twilio to Chunghwa Telecom network subscribers in Taiwan. Our team is actively investigating this issue. Message delivery may succeed, but delivery receipts may be delayed. We will provide another update in 1 hour or as soon as more information becomes available.

What APIStatus.watch saw

• Oct 6, 2026, 14:30 UTCoperational → unknown
• Oct 6, 2026, 14:39 UTCunknown → operational

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