Click domains

Tracked clicks, opens, the online version, and unsubscribe links need a host that is not your From domain. A custom click domain is the durable fix: recipients see your brand, and a blocklist hit on Lumail's shared fallback cannot take your mail down.

Why this matters

The shared fallback lives under a dedicated lt. zone, one hostname per organization (<org-id>.lt.<shared-domain>). That isolates host-level filters and tells us which org caused a spike. Slugs can be renamed and reused, so minted hosts use the stable org id. It does not protect against a Spamhaus DBL listing of the shared registrable domain — DBL lists the registrable domain, so every subdomain follows.

Your own verified web domain used as a click domain keeps reputation aligned with the domain you already send from.

Set one up

1. Add and verify a web domain (click.yourdomain.com is the usual name).
2. Open Settings → Click domain.
3. Select that verified domain.

New tracked links then mint on https://click.yourdomain.com/... with no extra subdomain. Already-sent mail on the shared host keeps working.

Shared fallback

Organizations without a custom click domain mint on Lumail's current shared zone. Prefer setting your own domain before a large send, especially on a young or newly recovered shared host.