Overview
A custom domain tracking (CDT) lets you track recipient interactions with your emails (opens, clicks, etc.) while improving your sender reputation.
It typically looks like this: tracking.your-domain.com.
Your leads won’t really notice this URL — they’ll be automatically redirected to the final link after clicking. The tracking domain only appears if they hover over the link in your email.
Key benefits
Better deliverability:
Without a CDT, you’re using La Growth Machine’s shared tracking domain — which means other users’ actions can affect your sender reputation.
By using your own tracking domain, you build your own email reputation, leading to higher deliverability rates.Domain consistency:
If your tracking domain doesn’t match your email domain, mail providers may flag your emails as spam or phishing.
A consistent domain builds trust and keeps your emails out of the spam folder.Higher engagement rates:
Leads are more likely to click a link that feels familiar and trustworthy.
Think about it — you wouldn’t click a “bank123-tracking.com” link from your bank, right? The same logic applies here.
How to set up your custom domain tracking
Step 1: Access your settings
Go to Settings > Custom Domain Tracking.
Click Add Subdomain.
Step 2: Generate your subdomain
Select your domain.
All emails sent from this domain will use your custom domain tracking.
Click Generate Subdomain.
You’ll then see your CNAME record and possibly one or two TXT records to add to your domain provider.
Step 3: Update your domain provider
Copy the CNAME and TXT values from La Growth Machine.
Log in to your domain provider and paste them into your DNS settings.
Follow the specific guide for your provider:
Step 4: Verify your setup
Wait up to 72 hours for DNS propagation.
Once verified, your screen will show that the domain is active — you’re good to go!
If not, double-check your records here:
👉 https://dnschecker.org/#CNAME/t.lagrowthmachine.com
How to check your custom domain tracking status
You do not need to open your DNS settings to know where your custom domain tracking stands. La Growth Machine shows its status directly in Email Settings, for each connected email.
The status can be one of the following:
Not configured: no custom domain tracking is set up for this email yet
Pending: your records are in place but the verification is still running
Invalid: your records could not be verified, so the tracking is not active
Valid: your custom domain tracking is verified and active
Email Settings also includes a dedicated Custom domain tracking section in the right panel, with a contextual button:
Setup if nothing is configured yet, which takes you to All Settings > Custom domain tracking to generate your subdomain
View if a domain already exists, so you can check its records and its status
Note: DNS verification can take up to 72 hours. A Pending status right after your setup is normal.
Where the Deliverability issues label comes from
When you create or edit a campaign, La Growth Machine shows a Deliverability issues label on an identity in Campaign > Identity if its email configuration needs attention. Clicking the label takes you to Email Settings.
The label appears when:
Your SPF, DKIM or DMARC records are invalid or still pending
Your custom domain tracking is invalid or still pending
Important: a custom domain tracking that is simply not configured does not trigger the label. Only the Invalid and Pending statuses do. If the identity is also disconnected, the Disconnected label takes priority and is shown instead.
FAQs
What if my DNS record isn’t active after 72 hours?
What if my DNS record isn’t active after 72 hours?
Double-check your CNAME and TXT entries for typos or extra spaces.
If you’re using Cloudflare, make sure the proxy is disabled.
Do I need to add a TXT record?
Do I need to add a TXT record?
Not always! If no TXT record appears in your setup screen, you don’t need to add one.
Why do I see a Deliverability issues label on my identity?
Why do I see a Deliverability issues label on my identity?
Its SPF, DKIM or DMARC records, or its custom domain tracking, are invalid or still pending. Click the label to open Email Settings and check each status.
Does a missing custom domain tracking trigger a Deliverability issues label?
Does a missing custom domain tracking trigger a Deliverability issues label?
No. Only an Invalid or Pending custom domain tracking triggers the label. If nothing is configured, La Growth Machine does not flag it in your campaign.