SendGrid incident: SMS Delivery Receipt Delays from Twilio to CTBC Brazil

Affected components

• SMS, Latin America

1. resolvedSep 30, 2026, 05:45 UTC

   The incident has been resolved and SMS delivery receipts from Twilio to CTBC network subscribers in Brazil are operating normally.

2. monitoringSep 30, 2026, 03:43 UTC

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

3. identifiedSep 29, 2026, 21:24 UTC

   Twilio customers may be experiencing SMS delivery receipt delays from Twilio to CTBC network subscribers in Brazil. 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 24 hours or as soon as more information becomes available.

4. identifiedSep 29, 2026, 05:23 UTC

   Twilio customers may be experiencing SMS delivery receipt delays from Twilio to CTBC network subscribers in Brazil. 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 16 hours or as soon as more information becomes available.

5. identifiedSep 28, 2026, 21:23 UTC

   Twilio customers may be experiencing SMS delivery receipt delays from Twilio to CTBC network subscribers in Brazil. 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 8 hours or as soon as more information becomes available.

6. identifiedSep 28, 2026, 17:22 UTC

   Twilio customers may be experiencing SMS delivery receipt delays from Twilio to CTBC network subscribers in Brazil. 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 4 hours or as soon as more information becomes available.

7. identifiedSep 28, 2026, 15:17 UTC

   Twilio customers may be experiencing SMS delivery receipt delays from Twilio to CTBC network subscribers in Brazil. 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.

8. identifiedSep 28, 2026, 14:12 UTC

   Twilio customers may be experiencing SMS delivery receipt delays from Twilio to CTBC network subscribers in Brazil. 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.

9. investigatingSep 28, 2026, 13:25 UTC

   Twilio customers may be experiencing SMS delivery receipt delays from Twilio to CTBC network subscribers in Brazil. 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

• Sep 29, 2026, 14:26 UTCoperational → unknown
• Sep 29, 2026, 14:31 UTCunknown → operational
• Sep 29, 2026, 14:41 UTCoperational → unknown
• Sep 29, 2026, 14:51 UTCunknown → operational
• Sep 29, 2026, 15:31 UTCoperational → unknown
• Sep 29, 2026, 15:36 UTCunknown → operational

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SendGrid reported 355 incidents in the last 90 days, 2 of them major or critical. A typical incident lasted 6h 17m. See SendGrid's uptime and incident history