20 Host Or Domain Name Not Found Update

Bold emphasis is mine.
Host or domain name not found. Yes please go ahead and delete those now just to be safe. Old ip 103 11 12 1 29 change to 103 11 12 4 29. Just by adding the host name in the hosts file and sending mail abc host dom will not work.
Host not found try again. By default webmin install postfix bind dns server. However you can ask your service provider to give you an smtp server to which you can do a smart host transfer if you are trying to send mails locally internally to systems.
You will need to update either the network interface for virtual addresses or default virtual server ip address fields on the module configuration page. You need to figure out what ip address your account is assigned to. Within postfix it sets myorigin parameter to etc mailname.
Host or domain name not found. In cpanel when you re on the home page there should be some server stats. Solved zimbra change ip public host or domain name not found www itlampung com jika anda dihadapkan pada situasi untuk melakukan perubahan ip public mail server zimbra ada beberapa hal yang harus dirubah.
This file contains only hostname but not fqdn. Jika ip public baru masih dalam satu subnet dengan ip public yang lama maka tidak ada perubahan yang dilakukan example. It seems like you are using gmail s smtp servers for outgoing mail.
Here xyz is the host name of the droplet and not the domain name. Unsure what your base os is but based on this answer on ubuntu forums this seems to be an issue with a missing resolv conf on reboot. Name service error for name xyz type a.