Retroactive Incident - Issues with encoded Special Characters in email From headers
Aug 5, 18:00 UTCAug 5, 18:00 UTC
Duration
0m
Impact
Informational
Root cause
Not disclosed
Twilio, 90 days
545 incidents
Affected
Not listed by the vendor.
Final update
Starting on July 16th 2026, to July 31st 2026, customers may have encountered errors when sending emails via SMTP with encoded special characters in the From header. Our engineers noticed the issue and apply a fix to correct it. There is no data loss. The issue has been resolved, and all impacted services are operating normally.
Timeline
- Resolved · Aug 5, 18:00 UTC
Starting on July 16th 2026, to July 31st 2026, customers may have encountered errors when sending emails via SMTP with encoded special characters in the From header. Our engineers noticed the issue and apply a fix to correct it. There is no data loss. The issue has been resolved, and all impacted services are operating normally.
More from Twilio
Full history| Started | Incident | Impact | Duration |
|---|---|---|---|
| Sep 2319:34 UTC | Voice Call Failures from a Subset of Twilio Mobile Numbers to United Kingdom | minor | Ongoing |
| Sep 2317:57 UTC | SMS Delivery Failures from Twilio Alphanumeric Sender IDs to MTN Nigeria | minor | 5h 54m |
| Sep 2315:02 UTC | Voice Call Failures from a Subset of Twilio Phone Numbers to Norway | minor | Ongoing |
| Sep 2312:53 UTC | SMS Delivery Delays from Twilio to MASS Response Austria | minor | 4h 20m |
| Sep 2310:58 UTC | SMS Delivery Failures from Twilio to Multiple Countries | minor | 9h 12m |
| Sep 2306:32 UTC | SMS Delivery Delays from Twilio Phone Numbers to Tele2 Sweden | minor | 5h 53m |
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