We've confirmed and resent the majority of our affected emails, and are in touch with authors with whom we haven't automatically resent on their behalf.

Postmark has reported that this incident is now resolved.

Our team is continuing to test and monitor.

Postmark has implemented a fix for the deliverability issue that caused their IPs to be flagged by Gmail and other providers.

We're actively monitoring and will post an update once this is resolved.

If you're sending from a custom domain, continue waiting to send large emails until this is fully resolved.

We're tracking Postmark's incident that is causing a lot of their IPs to be flagged by Gmail and other providers.

If you're sending from a custom domain, this likely impacts you; refrain from sending large emails unless you absolutely need to.