---
title: "Is CustomerIO Message Sending down? CustomerIO Message Sending status"
url: "https://www.openstatus.dev/status/customer/message-sending"
description: "Live CustomerIO Message Sending status, uptime over the last 45 days and recent incidents, tracked by openstatus."
---

# Is CustomerIO Message Sending down?

**Answer:** No, CustomerIO Message Sending is not down. All CustomerIO Message Sending systems are operational.

- Status: operational
- Checked: 2026-11-07T09:50:02Z
- User reports in the last 15 minutes: 0
- Part of: [CustomerIO](/status/customer.md)
- Official status page: https://status.customerio.com
- About: Outbound messaging services

## Last 45 days

2 of 2 tracked days without issues.

## Incidents affecting Message Sending

| Started | Incident | Impact | Duration |
| --- | --- | --- | --- |
| 2026-09-19 | [Some US customers may experience delays in message sending](https://stspg.io/55whld52j1hp) | minor | 27m |
| 2026-09-04 | [Reduced Deliverability to Microsoft-Hosted Email Addresses](https://stspg.io/zs381hpbdrrv) | incident | 1h 19m |
| 2026-07-20 | [Some customers are experiencing data processing and message-sending delays](https://stspg.io/tp9vbdm7ldkf) | minor | 1h 23m |
| 2026-07-20 | [Delays in message sending](https://stspg.io/2dq8l0949v0t) | major | 40m |
| 2026-07-10 | [Delays processing send events in some environments](https://stspg.io/350w5zyhtcbt) | incident | 41m |

## Links

- HTML page: /status/customer/message-sending
- Service: /status/customer.md