Cloudflare Access one-time PIN emails blocked by certain email security gateways, including Proofpoint
View the provider incident record →Current answer
Cloudflare experienced a minor incident: Cloudflare Access one-time PIN emails blocked by certain email security gateways, including Proofpoint. ServiceAlert observed recovery on Sep 2, 2026.
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Incident Lifecycle
Affected Components
Access
Incident Timeline
Investigating
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.
Sep 1, 2026 at 8:06 PM UTC
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