配置登陆页面子域 lp-subdomains

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• TL;DR: This page explains how to configure, use, and undelegate the subdomains used to build landing page URLs, either by reusing a subdomain already delegated to Adobe or by delegating a new one.

Intents

• Reuse a subdomain already delegated to Adobe for landing pages.
• Configure a new subdomain for landing pages by generating a matching DNS record.
• Identify which subdomain prefixes are reserved or restricted before submitting a configuration.
• Check the delegation status of a landing page subdomain.
• Configure a WAF IP allowlist for a delegated landing page subdomain.
• Undelegate a landing page subdomain that is no longer needed.

Glossary

• Landing page subdomain: the subdomain used to build a landing page URL, either reused from an existing Adobe delegation or newly delegated for that purpose.
• Prefix: the alphanumeric and hyphen string entered by the user that displays in the landing page URL, combined with the selected subdomain.
• Delegated subdomain (product-specific): a subdomain already delegated to Adobe that can be reused as a landing page subdomain.
• Landing page preset: the configuration object that requires a landing page subdomain to be set up beforehand, from which its subdomain name is picked.

Guardrails

• The Manage Landing Page Subdomains permission on the production sandbox is required to access and edit landing page subdomains.
• Landing page subdomain configuration is common to all environments; any modification to a landing page subdomain also impacts the production sandboxes.
• Only alphanumeric characters and hyphens are allowed in the prefix.
• The cdn and data prefixes cannot be used, as they are reserved for internal use.
• The dmarc and spf prefixes should also be avoided (recommended).
• A subdomain that is already used as a landing page subdomain cannot be selected again.
• Multiple delegated subdomains of the same parent domain cannot be used for landing pages; however, multi-level subdomains of an already-used parent domain are supported.
• Capital letters are not allowed in subdomains.
• After submission, required checks can take up to 4 hours before the subdomain is ready for use.

Terminology

• Processing, Success, and Failed are the statuses a landing page subdomain can display during and after delegation.
• Do not confuse “delegating a subdomain” (making it available for use) with “undelegating a subdomain” (removing it from use).

FAQ

• Can I reuse a subdomain already delegated to Adobe for landing pages? Yes, as long as it is not already used as a landing page subdomain.
• What prefixes cannot be used? The cdn and data prefixes cannot be used, as they are reserved for internal use; the dmarc and spf prefixes should also be avoided.
• How long does subdomain validation take? Required checks can take up to 4 hours after submission.
• Can I use multiple delegated subdomains of the same parent domain? No, but multi-level subdomains of an already-used parent domain are supported.
• What happens if I fail to create the validation record on my hosting solution? The subdomain is marked as Failed.
• How do I undelegate a landing page subdomain? Unpublish the associated landing pages, optionally delete the CNAME DNS record without deleting an original email subdomain, then reach out to your Adobe representative.