Certified Mail Labels uses an advanced network of more than 125 datacenters to deliver our content and improve the usability of our services. This makes whitelisting the DNS records almost impossible. If your business or company is having the difficulty of accessing our site and you are behind a corporate firewall you should request your IT department to whitelist our domain. 


If you have difficulty with this process you should request your IP address(s) from your engineers and contact us by opening a Support Ticket at Certified Mail Labels and provide us your IP address.  We will verify your account and IP address then whitelist them to our distribution network.

For a number of reports and ten-year archive, we use a permanent HTTPS link. If you need a list of these links, please complete a ticket in the Feedback and Support area and ask for the list of CML Base URL File Names.