Click domains: Shared

A click domain is the hostname used for tracked links, open pixels, online email versions, and unsubscribe URLs. When you have not selected a custom click domain, Lumail provides one automatically through its shared click domain.

There is nothing to configure. Every organization receives its own stable hostname on Lumail's current shared tracking zone.

What recipients see

A normal destination such as:

https://yourwebsite.com/pricing

is represented in the email by a tracked URL similar to:

https://a1b2c3d4e5.shared-zone.example/r/link-id

The ten-character label identifies the organization inside Lumail's tracking system. It is derived from the organization's stable ID, not its editable slug, so renaming an organization does not break previously sent links.

The exact shared zone can change as Lumail maintains its tracking infrastructure. Previously sent links remain served on their original hostname.

What happens when someone clicks

Recipient clicks the tracked URL
            ↓
Lumail receives /r/link-id
            ↓
The click is attached to the email and subscriber
            ↓
Lumail redirects to the original destination

The shared domain does not replace or modify the destination website. It provides the short redirect step needed to measure the click before the browser continues to the original URL.

What uses the click domain

All four use the same selected origin: your custom click domain when one is active, otherwise your shared Lumail hostname.

Why each organization gets its own hostname

Lumail does not mint every organization's links on one identical hostname. The per-organization label provides host-level separation and allows Lumail to attribute traffic or investigate unusual activity without relying on an organization slug that can change.

This is useful isolation, but it is not the same as owning the registrable domain. Reputation systems can still evaluate the shared parent domain and affect every organization beneath it.

Shared versus custom

The shared option is useful while getting started and prevents tracking from being blocked by missing DNS setup. A custom click domain is recommended before sending at meaningful volume because recipients see your brand and you control the parent domain's reputation.

Switch to your own domain

1. Add and verify a web domain such as click.yourdomain.com.
2. Open Settings → Click domain.
3. Select the verified domain and click Use for clicks.
4. Send a test email and verify that its tracked links use your hostname.

Follow the visual custom click domain tutorial for the video, screenshots, DNS setup, and final verification.

Switch back to shared

In Settings → Click domain, click Use shared Lumail clicks. Newly generated links use the shared per-organization hostname again. Already-sent links keep their original hostname and remain valid.

What the shared domain does not do

• It does not change the destination behind a link.
• It does not bypass consent, unsubscribe, or deliverability requirements.
• It does not make every open reliable; inbox privacy features and image blocking can affect open tracking.
• It does not isolate the reputation of the shared parent domain as strongly as a custom domain.

Treat clicks as a useful engagement signal, not proof that a human read the entire email. Security scanners and inbox providers can also visit links automatically.