The change host name in /etc/sysconfig/network is really the primary one, unless it has been hardcoded into main.cf The main.cf entries you should concern yourself with is myhostname (defaults to actual hostname if missing) and mydestination which is the list of domains you accept mail for. I'd suggest just adding the new domain to mydestination is likely all you need. It's also possible that you old.com is setup as a virtual domain, in which case you need to add your new.com to that list instead. The info at http://www.postfix.org/documentation.html is quite good. If I were you I'd go through main.cf and look at each parameter in http://www.postfix.org/postconf.5.html and see what it does, so you know what you are changing. dave On Tue, May 13, 2014 at 12:11 AM, Leon Fauster <leonfauster at googlemail.com>wrote: > 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 > > > > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >