Resolved · lasted 6 h

Cloudflare outage on September 1

Reports for Cloudflare jumped to 396 an hour and stayed high for 6 h.

Started
2:00 PM
September 1, 2026 · UTC
Back to normal
8:00 PM
6 h later
Peak
396/hr
12× normal
Cloudflare’s incident
11 h 09 min
Cloudflare Access one-time PIN emails blocked by certain email security gateways, including Proofpoint

Reports during the outage

12:00 PM9:50 PM UTC

What Cloudflare said

www.cloudflarestatus.com
Resolved9/1/2026, 8:06 PM – 9/2/2026, 7:16 AM · 11 h 09 min

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

  1. Resolved · 7:16 AM

    This incident has been resolved.

  2. Investigating · 8:06 PM

    Some customers using email security gateway like 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.

Cloudflare posted its first update 6 h 07 min after reports started rising.

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