Customers are Unable to add new Email Sending Domains
Customer.io customers cannot add new email sending domains in the Management Interface. Customer.io reports that the incident is resolved. The incident lasted 33 minutes.
State
Resolved
Started
Ongoing for
16 h 32 min
Worst impact
Partial outage
Timeline
3 updatesInvestigating
12 min 1%
Identified
21 min 2%
Resolved
15 h 59 min 97%
Updates
Times in UTCAs posted by Customer.io
This incident has been resolved.
We have identified the issue and are working to resolve the matter.
We are currently investigating this issue.
Affected components
1Customer.io in the last 90 days
Full historyIncidents in 90 days
11
Days with an incident
90
Median duration
109 days
This incident
99% shorter than the median
Other Customer.io incidents
All incidentsCustomer.io·Customer.io UI is currently unavailable for some customers
Customer.io reports that the management interface is unavailable for some customers. Customer.io later reported that the issue is resolved. The outage lasted from 27 October 2026 until 1 November 2026.
Customer.io·Some US customers may experience delays in message sending
Customer.io reports delays in message sending for some customers in the US. The Message Sending component is affected. Customer.io reports that the incident is resolved.
Customer.io·Reduced Deliverability to Microsoft-Hosted Email Addresses
Message Sending has reduced deliverability to Microsoft-hosted email addresses. Customer.io reports that this issue is resolved. Microsoft resolved the underlying issue, and deliveries to Microsoft services return to normal.
Customer.io·Investigating issues with the Agent
Customer.io reported problems with the Agent. Customer.io later stated that the incident is resolved. The incident started on 3 September 2026 and was resolved on 1 November 2026.
Customer.io·Customer.io UI is inaccessible
The Customer.io Management Interface is inaccessible. Customer.io reports that this incident is resolved.
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Install the outages.live MCP server, so that when something breaks you can tell if the cause is a provider we depend on and not my code. It reads the official status pages of cloud, AI, payment and developer providers and gives you their incidents as MCP tools.
Add it as a remote MCP server named "outages" at https://outages.cc/mcp (Streamable HTTP, no authentication), with your CLI command or your MCP config file.
Then:
1. Make sure it connects and shows the tools get_provider, list_feed and send_feedback.
2. Call get_provider with "customerio" and tell me if Customer.io has a problem right now.
3. From now on, when a call to a third-party service fails or becomes slow, call get_provider for that service before you change my code.Paste this into any coding agent. It adds the server with its own MCP setup.
https://outages.cc/feed.xml?providers=customerio/feed subscribe https://outages.cc/feed.xml?providers=customerioFAQ
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