# Customer.io: Customers are Unable to add new Email Sending Domains

> Customer.io status incident “Customers are Unable to add new Email Sending Domains” on 2026-11-07: impact major (vendor’s label), 21 min, 3 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/customer-io/incidents/18mtgfdc6n5b
Last updated: 2026-11-07T00:34:02Z

- Impact (vendor’s label): major
- Status: resolved · edited after publishing
- Started: 2026-11-07 00:03 UTC · Resolved: 2026-11-07 00:24 UTC · Duration: 21 min
- Updates: 3 · Affected components: Management Interface
- [Vendor status page: https://status.customerio.com/incidents/18mtgfdc6n5b](https://status.customerio.com/incidents/18mtgfdc6n5b)
- [Company: Customer.io](https://rewindex.com/company/customer-io.md)

## Timeline of updates

- **investigating** 2026-11-06 23:53 UTC: We are currently investigating this issue.
- **identified** 2026-11-07 00:03 UTC: We have identified the issue and are working to resolve the matter.
- **resolved** 2026-11-07 00:24 UTC: This incident has been resolved.

## Rewindex changes for this incident

- 2026-11-07 00:03 UTC: [Major incident: Customers are Unable to add new Email Sending Domains](https://rewindex.com/change/i920304656aabf1.md)
- 2026-11-07 00:34 UTC: [Incident updated: Customers are Unable to add new Email Sending Domains](https://rewindex.com/change/r323b11a74e9a0a.md)

## Cite this

Status incident (vendor impact label: major) posted by Customer.io, started 2026-11-07 00:03 UTC, resolved after 21 min, 3 update(s); edited after publishing.

- Canonical URL: https://rewindex.com/company/customer-io/incidents/18mtgfdc6n5b
- Citation: Customer.io, “Customers are Unable to add new Email Sending Domains” (2026-11-07 00:03 UTC). Archived by Rewindex: https://rewindex.com/company/customer-io/incidents/18mtgfdc6n5b (CC BY 4.0).
- Markdown link: `[Customer.io: Customers are Unable to add new Email Sending Domains (2026-11-07)](https://rewindex.com/company/customer-io/incidents/18mtgfdc6n5b)`


---
Canonical: https://rewindex.com/company/customer-io/incidents/18mtgfdc6n5b · Markdown: https://rewindex.com/company/customer-io/incidents/18mtgfdc6n5b.md · JSON: https://rewindex.com/api/v1/companies/customer-io/incidents/18mtgfdc6n5b · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-07T16:20:41.166Z