[CentOS] Change server name in postfix configuration

[Leon Fauster]

Am 12.05.2014 um 14:56 schrieb Laurent CREPET <pebkac at itguy.fr>:
> 
> On Mon, May 12, 2014 at 2:12 PM, Joseph Hesse <joehesse at gmail.com> wrote:
> 
>> A consultant, long gone, set up postfix, dovecot, amavisd and
>> squirrelmail for my wife.
>> It works fine but my wife wants to change the server name from old.com
>> to new.com so the name is more appropriate for her business.
>> My approach would be to use sed to change all occurences of old.com to
>> new.com.
>> Specifically, I used grep to identify the following files where I should
>> make the changes.
>> 
>> /etc/postfix/main.cf
>> /etc/dovecot/dovecot.conf
>> /etc/squirrelmail/config.php
>> /etc/amavisd.conf
>> /etc/sysconfig/network (change host name)
>> In addition, there would be an MX record for mail.new.com pointing to
>> the IP of the server.
>> 
>> My question is, will this work or will I corrupt my email server? If I
>> mess it up I can always restore it to the original.
>> 
> - Maybe check /etc/hosts.
> - What about the old domain ? You may not be able to receive e-mails for
> it. You can think about add the new.com in parallel with old.com on the
> same server.


Check also your hosting name (e.g. httpd service). 

BTW - the MX entry can still have the old name and accepting new.com-mails.

Furthermore - take care if SSL/TLS is in use. Certificates are connected to domainnames.

--
LF