Recipients see links on your own subdomain, like track.yourdomain.com, instead of a shared host. Custom tracking is included on the Growth and Scale plans.
Turn it on for a verified domain, then add the two DNS records it gives you. If your DNS provider supports it, Set up automatically appears on the domain page and you approve both records in one step. Manual records always work.
samva email domains custom-tracking enable dom_abc123 --label links
Samva checks DNS and the HTTPS certificate before it starts using the new host, so a half-finished setup doesn't affect your links.