I'm getting an email error due to my reverse hostname not being found.

So I have ubuntu 14.04 droplets. The FQDN is set in the hosts file. I see in some threads that if I rename my droplets to I’m assuming their FQDN that the reverse dns lookups will be created. Is this correct? If so, how do I rename my droplets?


Submit an answer
You can type!ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

One way I found to rename a droplet is to take a snapshot and then create a new droplet with a different name based on the snapshot:

  1. shutdown droplet named A (and keep it shutdown)
  2. from DO control panel, take snapshot of droplet A
  3. from DO control panel, create a new droplet named B based on snapshot of droplet A
  4. configure droplet B DNS entries and unconfigure droplet A (take notes before you do)
  5. boot droplet B and wait N hours to test propagated DNS entries
  6. if droplet B works, then delete droplet A