> ## Documentation Index
> Fetch the complete documentation index at: https://docs.growthxai.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Unsubscribe Links, Signatures and Email Tracking

> Mailbox rotation, one-click unsubscribe, per-mailbox signatures, a separate email schedule, BCC to your CRM and a custom tracking domain.

Everything on this page is set per mailbox on the sender's page, or workspace-wide under **Settings → Email & booking**.

## Unsubscribe link

Put `{{unsubscribe_link}}` in any email step. It is filled in when the email is sent.

* Each link is signed **for one lead**. One click is enough — there is no login and no form.
* It sets the lead's **Unsubscribed** flag, which ends their live enrollments across the workspace and blocks future outreach on every channel.
* The link is **never rewritten for click tracking**, so it stays short and trustworthy.
* Each unsubscribe fires the `lead.unsubscribed` webhook.
* The one-click unsubscribe header is sent alongside it, for mail clients that offer their own button.

The pre-launch check warns you (`W_NO_UNSUBSCRIBE`) when an email step has no unsubscribe link. It is a warning, not a block, but there are very few good reasons to ignore it.

<Note>
  Unsubscribing keeps the lead, the timeline and the conversation. Nothing is deleted.
</Note>

## Signature

Each mailbox has its own **Signature** (HTML allowed, plain text works too). Use it as `{{sender.signature}}` in an email step. A preview sits under the field.

## Mailbox rotation

An email step can send from a **pool** of the sender's mailboxes rather than one fixed address, splitting the volume evenly.

A contact who has been emailed before always gets **the same mailbox again**, so a thread never appears to change sender.

Link a mailbox to the person who owns it with **Belongs to** on the mailbox settings. That is what makes "the sender's own mailboxes" a meaningful pool. A mailbox with nobody set is a shared mailbox.

## Separate email schedule

A mailbox has its own working hours, independent of the LinkedIn sender it belongs to. Email at 07:00 is normal; a LinkedIn invitation at 07:00 is less so.

Set it on the mailbox's **Schedule** tab, exactly as for a LinkedIn sender.

## BCC to your CRM

Set **BCC to CRM** on a mailbox — for example `12345@bcc.hubspot.com`. Every email from that mailbox is copied there. HubSpot, Pipedrive and Salesforce all log email this way, which gives you CRM logging without any integration.

For real two-way sync, see [CRM Sync](/integrations-api/crm-sync).

## Tracking on manual replies

Automated email steps track opens and clicks by default. A one-to-one reply you write in the Inbox does not need a tracking pixel, and it can hurt deliverability.

**Track opens and clicks on manual replies** is therefore **off by default**. Set it per mailbox, or leave it following the workspace default.

## Custom tracking domain

Open and click tracking rewrites the links in your emails. With your own domain, those links read `link.agency.com/…` instead of a shared tracking host — better for both trust and deliverability.

<Steps>
  <Step title="Choose a hostname">
    Under **Settings → Email & booking**, enter a subdomain you use for nothing else, for example `link.agency.com`.
  </Step>

  <Step title="Add the CNAME">
    Point it at `s1.lnk-fllw.com`. The page shows the exact record.
  </Step>

  <Step title="We check the DNS">
    The status moves from **pending DNS** to **awaiting approval** once the record resolves.
  </Step>

  <Step title="The email provider approves it">
    This step is done by hand on their side and is not instant. The status becomes **active** when it is done, and your emails start using your domain.
  </Step>
</Steps>

Until it is active, the default tracking domain is used, so nothing breaks while you wait.

<Warning>
  Each domain is approved by hand by the email provider, so this is an **Agency and white-label plan** feature. Removing a domain and adding it again later means going through approval again.
</Warning>

## Related articles

* [How to Connect a Mailbox](/email-management/connect-a-mailbox)
* [Sequence Nodes](/sequences/creating-managing-sequences/sequence-nodes)
* [CRM Sync](/integrations-api/crm-sync)
* [White-Label and Custom Domains](/agencies-and-clients/white-label)