All systems are fully operational.

We have been able to identify the sending issues and expect normal email deliverability for customers using shared email hosting to be restored over the next 24-48h.

Customers using custom domains should be able to deliver emails immediately.

Customers using HTTP passthrough subdomains for web push are unable to subscribe new subscriptions, however existing subscriptions will continue to receive notifications. This will resolve over the next 24-48h.

Most OneSignal customers do not currently use these features and are not affected.

We are actively working on a fix to recover email delivery for os.tc domains.

We have identified an issue with customer branded .os.tc subdomains, partially impacting email delivery and webpush prompts. The impact is limited to http webpush usage and only email customers who use .os.tc for delivery.