Email sent to recipients with valid Apple domain addresses is confirmed to now be working, and the subscription status of users associated with email addresses that bounced during the outage window have been reverted to the state prior to the bounce events.
We'll share any postmortem findings when we get more information from our ESPs and Apple.
We are monitoring and verifying that all emails were successfully delivered.
Posted Apr 26, 2021 - 13:27 EDT
Investigating
Starting around 7:13 AM ET emails being sent to Apple domains are being responded to with a high percentage of errors: '550 5.1.1 : user lookup success but no user record found' for valid addresses.
While this issue persists emails that should have been delivered to valid email addresses will have bounced. We expect all emails to be eventually delivered and the subscription status of users associated with those email addresses to be unaffected.
No action is necessary at this time, we'll update when we get more information from our ESPs and Apple.
Posted Apr 26, 2021 - 12:09 EDT
This incident affected: US 01 Cluster (Outbound Messaging), US 02 Cluster (Outbound Messaging), US 03 Cluster (Outbound Messaging), EU 01 Cluster (Outbound Messaging), US 06 Cluster (Outbound Messaging), US 08 Cluster (Outbound Messaging), and US 04 Cluster (Outbound Messaging).