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Outage in Customer.io

Some customers are seeing broadcast delivery delays (emails, push notifications, and webhooks)

Resolved Minor
May 29, 2026 - Started 22 days ago - Lasted about 1 hour
Official incident page

Incident Report

Summary AI Generated

Customer.io experienced a 45-minute incident where broadcast messages (emails, push notifications, and webhooks) were delayed and showing as "queued" instead of being delivered normally. The issue affected the Message Sending component, preventing timely delivery of customer communications. Engineers identified and resolved the problem, restoring normal message throughput after implementing a fix.

Our engineers are aware of an issue where messages may be showing as "queued". We're investigating this now. Thank you for your patience!
Components affected
Customer.io Message Sending

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Latest Updates ( sorted recent to last )
RESOLVED 22 days ago - at 05/29/2026 05:08PM

We have confirmed that this incident is now resolved. Thank you very much for your patience!

MONITORING 22 days ago - at 05/29/2026 04:51PM

We have a resolution in place and are monitoring message throughput recovery now. Thank you for your patience!

IDENTIFIED 22 days ago - at 05/29/2026 04:40PM

We've identified the issue and are working towards a resolution now.

INVESTIGATING 22 days ago - at 05/29/2026 04:26PM

Our engineers are aware of an issue where messages may be showing as "queued". We're investigating this now. Thank you for your patience!

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