Outage in Cloudflare
Cloudflare Access one-time PIN emails blocked by certain email security gateways, including Proofpoint
Minor
September 01, 2026 - Started about 7 hours ago
Official incident page
Official incident page
Incident Report
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.
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INVESTIGATING
about 7 hours ago - at 09/01/2026 08:06PM
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.
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