[CentOS] internal messages problem with postfix

[Mufit Eribol]

Brian wrote:
> Mufit Eribol wrote:
>> Hello,
>>
>> After a server crash, I re-installed postfix, cyrus-imapd, 
>> amavisd-new, spamassassin on a Centos 5.1 box. But, now mail system 
>> behaves somewhat different.
>>
>> There is no problem with mail receiving/sending from/to internet.
>>
>> Before the crash, mail system used to sent internal messages to 
>> root at example.com. But now, I can't receive internal messages as it 
>> tries to send them to root at server.example.com. I used the same 
>> postfix, cyrus-imapd, amavisd-new, /etc/aliases conf files from the 
>> previous setup.
>>
>> Must be a configuration issue I overlook. Could anybody please tell 
>> me what to check?
>>
>> Best wishes,
>> Mufit
>>
>> main.cf:
>> mydomain = example.com
>> myhostname = server.example.com
>> mydestination = example.com ...
>>
>> amavisd.conf
>> $mydomain = 'example.com';
>> $myhostname = 'server.example.com';
> In main.cf check this setting. Someone probably has a better answer 
> then me
> but just for thought.
>
> myorigin = $mydomain
>
> hth.
>
Thank you for your reply. But, it is already set as you told.

I installed CentOS to a formatted hard disk but used the same conf files 
for postfix, amavisd-new, cyrus-imapd, /etc/aliases from the previous 
setup. Somehow, mail system gets the "server name" as the "domain name" 
for the internal messages.

[root at server ~]# uname -n
server.example.com
[root at server ~]# hostname -d
example.com
[root at server ~]# hostname -f
server.example.com
[root at server ~]# hostname
server.example.com

It looks names are configured correctly. I am stumped!