On 2011-12-01 10:56, Roland de Lepper wrote:
> Where're planning to migrate postfix from Suse to Ubuntu 10.04 LTS.
> The Postfix version on Suse has an higher version number than in
> Ubuntu 10.04LTS (2.7.2 - 2.7.0).
> Because of the migration we have to shutdown the MySQL server to make
> a full dump of it and import is on the new mailserver. In the
> meantime, all mail coming to the old-mailserver will be stored in the
> HOLD queue.
Why ? Just disable the qmgr(8) and no delivery attempts will be made.
Set up your new mailserver to accept all mail from the old one and
forward the existing mail to the new mailserver.
> When the new Mailserver is ready (with the same hostname and
> public-ipaddress) I want to copy the HOLD queue from the old
> mailserver to the new mailserver,
NO. Copying queue files from one postfix installation to another is not
> then do a postsuper -r ALL to deliver the messages on the new mailserver.
The mail has to be re-queued on the old mailserver.
> Is this even possible?
Not the way you stated it, not without significant breakage.oland
Just FYI, if these programs sending mail cannot delay it, the messages
will still be queued and not delivered during the migration.
Why not just let them fail ?