Can not resolve host name for sending emails

[2hamed]

hey there,
I just got this notification and it seems I can't send emails(I can only receive them).

Cannot find your hostname using the command '/bin/hostname --fqdn'. Please check this command to ensure it works properly.
If you get the error:
hostname: Name or service not known

Check your /etc/resolv.conf and try setting it to use 127.0.0.1Unable to resolve your hostname, . This will cause major issues when sending email.

Solution:

Create an A record for your hostname (.) in your DNS control panel. Point the hostname to your server's main IP address. Also check /etc/hosts to ensure that the server ip is correctly set.

 

[zEitEr]

Hello,

Where did you get it? Please show results for:

/bin/hostname -f
cat /etc/resolv.conf

 

[2hamed]

I got that in DA's message system.
here is the results for the command you said:
for:/bin/hostname -f

hostname: Name or service not known

for:cat /etc/resolve.conf

nameserver 4.2.2.4
nameserver 8.8.4.4

regards

 

[zEitEr]

So it seems hostname is not installed on your box. You should add it manually.

 

[2hamed]

and how should i do that?

 

[nobaloney]

Research documentation for the OS distribution you're using.

Jeff

 

[2hamed]

well, I use Ubuntu. but doesn't it need to be done through DirectAdmin?
or what? is it independent from DA?

 

[SeLLeRoNe]

try this:

find / -name hostname

Regards

 

[zEitEr]

To install it, make sure i't not installed

aptitude search hostname
i   hostname                             - utility to set/show the host name or domain name

«i» means installed.
«p» not installed

and run

aptitude install hostname

That's very simple. Read FAQ and MAN on how to use apt-get or aptitude.

 

[2hamed]

hmm, it says it is already installed!
what to do now?
do I have to reconfigure it?

 

[zEitEr]

Post here results for:

find / -name hostname

as Andrea asked before.

 

[2hamed]

here it is...

/bin/hostname
/etc/hostname
/etc/init.d/hostname
/usr/lib/byobu/hostname
/usr/share/doc/hostname
/proc/sys/kernel/hostname

 

[zEitEr]

cat /etc/hosts

?

 

[2hamed]

this is it...

# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost
127.0.1.1 srvubu100.screweb.com srvubu100

::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

178.162.145.82 srv771.screweb.com srv771
178.162.145.82 srv771.bitcommand.com
178.162.145.82 server1.novinhost.net

 

[SeLLeRoNe]

Post the result for

/bin/hostname

Aswell

Also, i think that 127.0.1.1 srvubu100.screweb.com srvubu100 must be removed but not sure

Regards

 

[2hamed]

the result is...

server1.novinhost.net

by the way my default domain is novinhost.net.

 

[SeLLeRoNe]

so one of the external ip in /etc/hosts (the server main, the one of directadmin license assigned) should be set to server1.novinhost.net

Regards

 

[2hamed]

but it's already been set to that!!!

 

[SeLLeRoNe]

try delete multiple line for same ip so.. honeslty ive no more ideas sorry...

 

[2hamed]

it didn't work! doing what you sail messed up everything in my server. I had to revert it.
any other help?!?!