Tracking domain verification failed
Custom tracking domains require a CNAME DNS record pointing to t.indigoroute.com, on a SUBDOMAIN of a domain you own. Common issues: 0) 'A tracking domain must be a subdomain' — you entered your bare domain (acme.com) rather than a subdomain (track.acme.com). Bare domains are refused when you add them, because pointing your bare domain at us would take your own website and email routing offline; accept the suggested track. version, or type your own subdomain. 1) 'No CNAME record found' — the Host field must be only the first part (track), not the full address. Most DNS providers add your domain for you, so pasting track.yourdomain.com saves the record as track.yourdomain.com.yourdomain.com, which verification never checks. Point that record at t.indigoroute.com. 2) 'CNAME record points to wrong target' — Your CNAME points somewhere else. Update it to point to t.indigoroute.com exactly. 3) DNS propagation can take up to 48 hours — try verifying again later. 4) If Verify says the record was saved on a longer name, edit the Host field down to just the first part (track) and verify again. 5) If that name already has a different record (for example your website), it cannot also be the tracking name. Add a CNAME whose Host is only track, pointing at t.indigoroute.com, then add track.yourdomain.com and click Verify. After verification succeeds, select the tracking domain in your campaign settings to use it for open and click tracking.