==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.6 MYSQL editio
- Linux/BSD distribution name and version: Debian
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): Mysql
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

Hi,

I'm trying to find a solution for a migration problem.

I'm actually moving mailbox from server-old to server-Iredmail.
I'm not managing and I cannot change anything on server-old.

I would like to
1) Change MX for set server-iredmail as MX server
2) Setup server-iredmail to BOTH deliver mail to local mailbox account and to dual delivery to server-old.
Accounts are setup on both servers.

I need to do this way for users to be able to have no interruptions.
And this ways I've time to configure user mail client (outlook, thuinderbird, ...) to use new server. And in the time between mx migration and client configuration they still receive emails !

I found only one idea but seems not the "good way" and script is not avaible:
http://pjrlost.blogspot.fr/2012/11/smtp … s-via.html

As other solutions, i'm thinking about to add an alias on server-iredmail, relay to server-old and bcc to alias.
But may don't work ( I think it won't)

I'm sur it's a common mistake and there is a common solution.
But cannot found it :-)

If someone already done it or have an idea I will be verry interrested