dual email delivery

[Roland de Lepper]

Hi,

I'm in front of a mailserver migration with Zarafa and Postfix.
We want to migrate as smooth as possible, offcourse, and I was thinking
about dual email delivery. This means that all incoming email will still go
through the old mailserver, record the message in the mysql database and
then relay the mail to the new mailserver. On the new mailserver the email
is recorded in the new mysql-database so both mysql databses are in sync.

I was thinking about transport-maps, but this only relay the message to
the new server. It will not record the message in Mysql first on the old
server, before it will relay it to the new mailserver.

This setup would be nice for migrating group by group in our organisation
and have a full rollback in case something goes wrong.

I such a setup possible?

Kind regards,

Roland

Re: dual email delivery

[Sahil Tandon]

On Wed, 2011-09-28 at 10:36:32 +0200, Roland de Lepper wrote:

 I was thinking about transport-maps, but this only relay the message
 to the new server. It will not record the message in Mysql first on
 the old server, before it will relay it to the new mailserver.

This is somewhat of a FAQ:

 http://article.gmane.org/gmane.mail.postfix.user/183665
 http://article.gmane.org/gmane.mail.postfix.user/123550

You may search the list archives for other examples, but the underlying
notion is that multiple deliveries require multiple recipients.

-- 
Sahil Tandon