Frequently Asked Questions

Here are some frequently asked questions. If you don’t find the answer to your specific issue here, please contact dns@pt.lu

Q. Occasionally when I click on a link not all the information is displayed?
A. Due to the way different browsers handle pages, occasionally on some browsers will not display the information. As a work around click on a different page link and then go back to the section you want to display. This normally fixes the issue. If the issue persists please contact dns@pt.lu

Q. What are the POST DNS servers ?
A. Please check here.

Q. PTR records: couldn’t be added/modifed via your customer portal
A. Please send your modification request to dns@pt.lu

Best Practices

How should I configure my Zone file management?

  • MX must have a CNAME  -> RFC2181, you couldn’t point MX directly on an IP address
  • Recommended settings: origin -> A record -> IP address; www CNAME -> origin
  • Use as much as possible CNAMES, this will ease maintenance works, avoid CNAME pointing to CNAME
  • Create SPF entry as TXT record – start with a soft fail, and watch your log files before setting hard fail, else you risk messages (FalsePositives) to be rejected
  • Don’t use short TTLs (