Cloudflare incident

Cloudflare Access one-time PIN emails blocked by certain email security gateways, including Proofpoint

Cloudflare experienced a minor incident on September 1, 2026 affecting Access, lasting 11h 9m. The incident has been resolved; the full update timeline is below.

Started: Sep 01, 2026, 08:06 PM UTC
Resolved: Sep 02, 2026, 07:16 AM UTC
Duration: 11h 9m
Detected by Pingoru: Sep 01, 2026, 08:06 PM UTC

Affected components

Access

Update timeline

investigating Sep 01, 2026, 08:06 PM UTC

Some customers using Proofpoint may experience delayed Cloudflare notifications and login codes. Proofpoint is temporarily deferring messages with an SMTP 421 4.7.0 response. Cloudflare will continue retrying delivery.
resolved Sep 02, 2026, 07:16 AM UTC

This incident has been resolved.