Twilio: Messaging Services Message Send Failures
Timeline of updates
- resolved
Our engineers have investigated and resolved an issue with Messaging Services. From 10:28AM PDT on Tuesday, 7/21/26 to 6:00PM PDT on Friday, 9/4/26, customers may have experienced HTTP 400 responses with Twilio error code 21620 when sending messages through Messaging Services if the media URL parameter contained a comma. The issue has been resolved and all impacted services are operating normally.
From Twilio’s published incident history: for incidents before Rewindex began polling this status page, only the final update text is available.
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This incident predates live tracking (October 17, 2026). It came from the vendor’s own published history, which is not covered by checkpoints.
Impact, status and times are the vendor’s own, as last archived. View on status.twilio.com (opens in new tab).
Cite this
Status incident (vendor impact label: none) posted by Twilio, started 2026-09-09 17:47 UTC, resolved after 0 min, 1 update(s).
- Title
- Messaging Services Message Send Failures
- Vendor
- Twilio
- Date
- URL
- https://rewindex.com/company/twilio/incidents/y8wgsmhy6jv8
Twilio profileRecent Twilio incidentsAll outages on September 9, 2026Twilio in September 2026MarkdownJSON