[DNS] Proxy status use cases #29789
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RebeccaTamachiro merged 11 commits intoApr 21, 2026
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This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:
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hannes-cf
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Apr 17, 2026
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| ### Connection timeouts | ||
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| Cloudflare enforces a default [Proxy Read Timeout](/fundamentals/reference/connection-limits/) of 120 seconds between Cloudflare and your origin server. If your origin does not send an HTTP response within this window, Cloudflare returns a [524 error](/support/troubleshooting/http-status-codes/cloudflare-5xx-errors/error-524/). Enterprise customers can [increase the timeout value](/cache/how-to/cache-rules/settings/#proxy-read-timeout-enterprise-only). |
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I wonder if we should reference the actual number here. What if we change it? How do we know to also change it here (and not only in the referenced page)?
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That's a good call 👍 I removed the duplicated table but missed this one. Thank you!
hannes-cf
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Apr 17, 2026
hannes-cf
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Apr 17, 2026
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| Cloudflare does not proxy SMTP traffic on port 25 by default. Proxying a record that handles email traffic causes mail servers to connect to Cloudflare's IP addresses instead of your mail server. This prevents email delivery. | ||
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| Use a dedicated hostname for email that is separate from your proxied web traffic hostname. If your MX record points to the same hostname as your website, Cloudflare creates a `dc-#####` record to route email traffic directly to your origin. Refer to [Email issues](/dns/troubleshooting/email-issues/) for details. |
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| Use a dedicated hostname for email that is separate from your proxied web traffic hostname. If your MX record points to the same hostname as your website, Cloudflare creates a `dc-#####` record to route email traffic directly to your origin. Refer to [Email issues](/dns/troubleshooting/email-issues/) for details. | |
| Use a dedicated hostname for email that is separate from your proxied web traffic hostname. If your MX record points to the same hostname as your website, Cloudflare dynamically prepends `dc-#####` to the hostname in the response for the MX record to route email traffic directly to your origin. Refer to [Email issues](/dns/troubleshooting/email-issues/) for details. |
or something similar that indicates that Cloudflare doesn't create a new record, but dynamically injects something into the response. Will dm you with more details, Rebecca.
ranbel
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Apr 20, 2026
ranbel
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Apr 20, 2026
ranbel
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Apr 20, 2026
Co-authored-by: ranbel <101146722+ranbel@users.noreply.github.com>
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Summary
PCX-21286
PCX-20722