Minor ImpactLast updated: Sep 2, 2026, 7:16 AM UTCRefreshed just now

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

Started

Sep 1, 2026, 8:06 PM UTC

Resolved

Sep 2, 2026, 7:16 AM UTC

Timeline

ResolvedSep 2, 2026, 7:16 AM UTC
This incident has been resolved.
InvestigatingSep 1, 2026, 8:06 PM UTC
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.