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About This Site

This site is updated regularly with information about service health, maintenance events, and other announcements.

Scheduled Maintenance
Scheduled Maintenance and Updates

On Wednesday, May 12th, 2021 between 9:00 AM EDT and 4:00 PM EDT we will be performing maintenance and updates on the SocketLabs Email On-Demand Platform. Any interruptions, if at all, should be brief. We appreciate your patience during this time.

Please note that availability of our email delivery services will NOT be interrupted.

Scheduled Maintenance and Updates

On Thursday, May 13th, 2021 between 8:30 PM EDT and 10:30 PM EDT we will be performing maintenance and updates on the SocketLabs Email On-Demand Platform.

While we will take every effort to minimize delays, some outbound mail still in queue may be briefly delayed as the updated infrastructure is restarted.

The availability of our inbound SMTP and Injection API infrastructure will NOT be affected.

Past Incidents

Wednesday 28th April 2021

No incidents reported

Tuesday 27th April 2021

No incidents reported

Monday 26th April 2021

Outbound SMTP Apple iCloud Mail Service Outage

Update: Apple has marked the issue as resolved and we have seen a significant decrease in the rate at which inaccurate 550 SMTP responses are being issued to message delivery attempts. All messages previously held in queue due to these errors have been successfully delivered.

Apple has reported a service issue for users of iCloud Mail. Only some users are affected. Users may be experiencing intermittent issues with this service. You can follow the status of this issue with Apple on their status page here: https://www.apple.com/support/systemstatus/

SocketLabs has identified Apple iCloud is improperly returning invalid address errors such as "550 5.1.1 : user lookup success but no user record found" for the impacted users. We have modified system behavior to treat this error as a temporary issue. Messages encountering this error response will be held in queue and automatically retried for delivery at an optimized frequency. As a result of this issue at Apple some SocketLabs customers may be seeing a higher than normal volume of messages being held in queue to domains operated by Apple.

Additionally, SocketLabs has proactively removed all addresses added to customer suppression lists today due to this error response. Further questions regarding this issue can be directed to [email protected]

Sunday 25th April 2021

No incidents reported

Saturday 24th April 2021

No incidents reported

Friday 23rd April 2021

No incidents reported

Thursday 22nd April 2021

Outbound SMTP [Resolved] Deliverability delays to mailboxes hosted at Microsoft Office 365.

Microsoft is reporting the issue has been resolved. https://twitter.com/MSFT365Status/status/1385268282685546496?s=20

SocketLabs is continuing to monitor mail queues for any lingering delays.

Outbound SMTP Deliverability delays to mailboxes hosted at Microsoft Office 365.

Microsoft Office365 has reported a issue with Exchange Online mailflow in North America. https://twitter.com/MSFT365Status/status/1385245913053020164

SocketLabs is experiencing delays to mailboxes hosted at Microsoft Office 365.