Help with Soft Migration from Postfix to Zimbra 6.x

[strikermdd]

Hello, i´m trying to migrate from my production ambient with uses Postfix as SMTP and Cyrus Imap and i need to migrate to my newer server using Zimbra.

I need to migrate in a soft way because we have more than 5.000 accounts and more than 200GB of data, this will need more than 2 days to move using imapsync and i don´t want stop email service in this period.

Like this :
Server A : Postfix and Imap ( And a LDAP )
Server B : Zimbra

I want to put the two servers running in same time, the Server A will be the 'Master' until the Server B be promoted to new master and will turn in Server A.

How i can configure Postfix to send the same messages recieved for Server A a copy to Server B ? ( using the same domain, not a secondary like some example i saw here )

How i can migrate the emails from server A to B in imapsync using a Master account of Postfix ? ( because i don´t want to reset the passwd from the old accounts )

Thanks for the help, i really want to make this migration less painfull possible and i thinks the guys here can help me with this.

[lytledd]

I want to put the two servers running in same time, the Server A will be the 'Master' until the Server B be promoted to new master and will turn in Server A.

You can get postfix to send a copy of all email by adding this to your main.cf:

milter_default_action = tempfail
smtpd_milters = inet:ip_address_of_second_serverort_number

Our looks like:

milter_default_action = tempfail
smtpd_milters = inet:10.0.0.11:8092

Doug

[phoenix]

Hello, i´m trying to migrate from my production ambient with uses Postfix as SMTP and Cyrus Imap and i need to migrate to my newer server using Zimbra.

I need to migrate in a soft way because we have more than 5.000 accounts and more than 200GB of data, this will need more than 2 days to move using imapsync and i don´t want stop email service in this period.

In addition to the changes mentioned above you'll need a Split Domain set-up.

[strikermdd]

Sending emails works fine, but i cant get the copy of emails from Server A to B work. When i put the lines :

milter_default_action = tempfail
smtpd_milters = inet:MYIP:25

The server stop working, and do not delivery any messages.

And i make the instructions of the Splited domain, but don't work too.

And anyone know how i can use a 'Master' Account type in Postfix ( like Dovecot ) to not need know the passwd for the accounts when i use imapsync ?