Link tracking domain
A branded host such as click.example.com that records an email click before redirecting, instead of putting a shared vendor domain in every link.
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What it is
A link tracking domain is the host used for click redirects in tracked email, such as 'click.example.com'. The visible link points there, the tracking service records the click, then returns an HTTP redirect to the real page. Branding that host with your domain avoids putting a vendor's shared tracking name like 'sendgrid.net' into every message and makes the hop less surprising to recipients and filters.
Set one up when click tracking is required and the ESP supports custom link branding. The provider normally gives you an exact CNAME target and provisions HTTPS after DNS verifies. Keep it on a dedicated subdomain, verify that certificates renew, and test every redirect through common security scanners before switching a live campaign.
A branded hostname does not erase the destination or the redirect provider's infrastructure. A compromised landing page, a reused short link, or abusive mail still earns blocks. Click tracking also adds a failure point and can leak recipient identifiers into URLs, so never put secrets in the path or query string and provide a way to turn tracking off for sensitive transactional mail.
Ask AI for it
Configure SendGrid Link Branding for click.example.com. Read the exact CNAME host and target values from the authenticated SendGrid domain setup and do not invent or flatten them. Produce every CNAME record to publish, because Link Branding issues two, verify them after the TTL with dig, enable SSL for the branded link, and send a test whose tracked HTTPS URL redirects once to the expected destination. Check the certificate hostname, redirect status, query-string handling, and behavior when the destination is down. Ensure tracked URLs contain an opaque campaign and link ID rather than an email address or secret, disable click tracking for password resets and magic links, and include a rollback that restores untracked direct links if DNS or TLS verification fails.