The AWS team has confirmed that the incident has been resolved. See https://health.aws.amazon.com/health/status for details

The AWS team is continuing to work toward full restoration of the use1-az4 data center. We are not seeing a large volume of platform issues, but will keep this incident open until AWS confirms full restoration.

A subset of orders may be experiencing slow or failed checkout due to an upstream AWS networking issue affecting one availability zone in us-east-1. Most orders are unaffected. AWS health status: https://health.aws.amazon.com/health/status. We're monitoring and will update as the upstream issue resolves.

Transactional email delivery to Yahoo and AOL addresses has been fully restored and is operating normally. Guests should no longer experience any delays with these emails.

We've seen a significant drop in latency for Yahoo users receiving emails. Less than 5% of users are still seeing more than a minute delay in receiving emails. We are continuing to monitor the progress and will provide an update once this is fully resolved.

We've identified an issue causing delays in transactional emails (receipts, rewards, and account notifications) for customers with Yahoo email addresses. Our engineering team has identified the root cause and has taken steps to mitigate it. We are actively working with Yahoo to restore normal email delivery as quickly as possible.

We'll continue to post updates here as we make progress.

We are aware of delays affecting transactional emails (login links, signup confirmations) to Yahoo, AOL, and AT&T email addresses, and have escalated to Yahoo teams to investigate and resolve.