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

Posted June 11, 2016 1.4k views

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?

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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