Shield aggressively holding messages

An update released at approximately 2:00 PM ET today was designed to improve protection against brand impersonation. It behaved more aggressively than intended, holding and jailing legitimate emails, particularly those with signatures containing social media links.
The update was rolled back at approximately 2:50 PM ET. This issue is resolved.

Actions taken to remediate after rollback:

- Inbound emails delivered to Junk have been reprocessed to ensure appropriate risk and moved to the Inbox.
- Released jailed emails; they may still land in Junk if the sender is new or carries a medium risk level.
- Outgoing emails that were held have been released. No action needed.

Emails that were delivered to the Jail due to the aggressive behavior of the update have been released. The emails may still end up in the Junk E-mail folder if the risk level is medium or low from a new sender.

An update to improve brand-related impersonation attacks was aggressively holding outgoing messages and sending inbound emails to the Junk E-mail folder. The update has been rolled back, and the held outgoing emails have been released. Emails delivered to the Junk E-mail folder must be moved out by users.

The aggressive protection was active from approximately 2:00 PM ET to 3:00 PM ET.