Re: How to set domain name permanently?

[nwe]

On 9/30/26 10:33 AM, Chris Green wrote:

All very well but there is software (e.g. postfix) that does need the
system's domainname and I'm not going to rewrite postfix! 🙂

From my running Debian13 postfix mail server:

nwe@mail:~$ ypdomainname
ypdomainname: Local domain name not set
nwe@mail:~$ domainname
(none)
nwe@mail:~$ dnsdomainname
gitcoding.net
nwe@mail:~$ cat /etc/mailname
mail.gitcoding.net
nwe@mail:~$ cat /etc/hostname
mail.gitcoding.net

I understand my postfix gets its hostname from /etc/hostname or /etc/mailname

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