On 2016-10-04 13:28, Zalezny Niezalezny wrote:

is it possible to route messages base on the sender IP address ?

yes its possible (sadly)

So for example from host A I would like to route all messages to host
Z and from the rest of the hosts to host Y.

google found this one here

https://www.howtoforge.com/community/threads/postfix-relay-one-domain-to-smarthost-a-all-else-to-smarthost-b.62955/

Is it possible some how to configure it ?

its much much more simple in dns

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