Sysadmin emails @localdomain

Hello,

Although my /etc/hosts file has my server name configuration :

Code (Text):

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
XX.XX.XX.XX hostname.MYdomain.com hostname

---

The emails that I got from root comes from root@hostname.localdomain ?!

How can I change this .localdomain to my domain used ?

Thanks

 

Yes.

The first command:

Code (Text):

postconf -d myhostname mydomain
myhostname = server1.localdomain
mydomain = localdomain

second one:

Code (Text):

Linux server1 4.9.15-x86_64-linode81 #1 SMP Fri Mar 17 09:47:36 EDT 2017 x86_64 x86_64 x86_64 GNU/Linux