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Hello,

I'm trying to set up a split domain (splitdomain.tld) environment due to a 
migration of mailboxes from one server to another.

Server Origin has 2 mailboxes (a...@splitdomain.tld and b...@splitdomain.tld).

Server Destination has also 2 mailboxes (c...@splitdomain.tld and 
b...@splitdomain.tld).

MX dns register points to server Destination.

Server Origin forwards any email not a...@splitdomain.tld or 
b...@splitdomain.tld to server Destination.

I have no administration of server Origin.

On server Destination I have configured :
- - MX points to mx.ServerDestination.tld
- - transport table contains splitdomain.tld via virtual_mailbox_domains
- - I have transport_maps = hash:/etc/postfix/transport_relay.cf on main.cf 
containing :
a...@splitdomain.tld    smtp:mx.ServerOrigin.tld
b...@splitdomain.tld    smtp:mx.ServerOrigin.tld

An email from u...@anotherdomainonanotherserver.tld to a...@splitdomain.tld 
reaches the mailbox on server Origin
An email from u...@anotherdomainonanotherserver.tld to c...@splitdomain.tld 
reaches the mailbox on server Destination.
An email from a...@splitdomain.tld to b...@splitdomain.tld reaches the mailbox 
on server Destination.
But an email from b@splitdomaintld can't reach a...@splitdomain.tld on server 
Origin because :

"Recipient address rejected: User unknown in virtual mailbox table"

I think that transport_maps is not executed when 'apparently' mailboxes are 
local.

Is there any way to achieve this?

Thanks,
regards,
Sergi

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Sergi Seira i Espunya, Administrador de Xarxes i Sistemes
 '^((https?://(www\.)?)|(s(ergi)?\.seira\@))cdmon\.com$'
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