I am using a linode running nginx. I wanted to have mail sending capabilities on my VPS, so I change the hostnames and reverse DNS but now I have messed up my DNS somehow and the site doesn't even resolve.
Here is what my DNS manager for the domain looks like
Here is what my Reverse DNS setting looks like (I changed it to mail.bankpo.in
)
Content of /etc/hostname
is mail.bankpo.in
Content of /etc/hosts
127.0.0.1 localhost
178.79.162.174 mail.bankpo.in
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
Command hostname -f
gives hostname: Name or service not known
I have also rebooted it, but it seems like I have done something wrong. Any advice please?