Document _dc-mx DNS records and improve email troubleshooting#29425
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abstergail wants to merge 2 commits intocloudflare:productionfrom
Open
Document _dc-mx DNS records and improve email troubleshooting#29425abstergail wants to merge 2 commits intocloudflare:productionfrom
abstergail wants to merge 2 commits intocloudflare:productionfrom
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Mar 30, 2026
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Summary
_dc-mxanddc-#####auto-generated DNS subdomains — what they are, why Cloudflare creates them, and when it is safe to remove them. Adds the explanation to the Unexpected DNS records page and cross-references from Email Routing DNS records and Email issues troubleshooting. The term_dc-mxwas previously undocumented.digverification commands, DashButton links, and specific guidance for common email DNS issues including SPF/DKIM/DMARC authentication failures.