SenderAuth and Whitelabel domain errors

This incident has been resolved.

Our engineers have implemented a fix and are monitoring system performance. We will provide another update in an hour or as soon as more information becomes available.

Starting around 10:17AM on May 22 2026, our engineers began investigating an issue affecting SenderAuth and Whitelabel domains. A subset of customers may be experiencing errors when attempting to make updates to their whitelabel domains. Mail send is not impacted. We will provide another update as soon as more information becomes available.