donovan jeffrey j:
>
> On Jul 29, 2010, at 7:16 AM, Wietse Venema wrote:
>
> > The simplest way to upgrade an existing configuration is:
> >
> > - Back up the new main.cf, master.cf, postfix-files, postfix-script
> > and post-install files.
> >
> > - Install the old main.cf and old master.cf and any files that
> > you have added to the old Postfix setup.
> >
> > - DO NOT INSTALL THE OLD POSTFIX-FILES, POSTFIX-SCRIPT AND POST-INSTALL
> > FILES. You must use the new versions of those files.
> >
> > - Execute (as root): "postfix upgrade-configuration". This will
> > update the old main.cf and old master.cf files and add missing
> > entries that Postfix needs.
> >
> > This procedure assumes that your vendor did not break "postfix
> > upgrade-configuration" or any of the files that it depends on.
> >
> > Wietse
>
> thanks Wietse
>
> these two systems have different mailbox_transports
> mailbox_transport = dovecot
> mailbox_transport = cyrus
>
> is it as simple as switching these two ? or are there any other
> considerations.
You'll also need to configure the receiving end (dovecot or cyrus).
> i have also needed to change the user and group info
>
> mail_owner = postfix to mail_owner = _postfix
> setgid_group = postdrop to setgid_group = _postdrop
My procedure above is for upgrading an existing setup when there
are no other changes.
If the new system has different usernames or pathnames etc. then
you'll need to put that into the new Postfix configuration.
Wietse
