To add a custom tracking domain on the Namecheap domain, you can watch the full video walkthrough by clicking the link here.
Start off by going to the settings for the email account:
Then, click on ‘Use custom tracking domain’
Add a new CNAME for your domain in the DNS panel
Record Type: CNAME
Host: inst
Value: prox.itrackly.com
Enable the custom tracking domain in Instantly
Enter
inst.yoursendingdomain.com
in Instantly with yoursendingdomain.com being the domain you added the CNAME record under.If everything is set up correctly you will receive the following notifications below the Check Status button: CNAME Verified SSL Verified.