I've found the solution. In postfix nexthop destination domains not enclosed in "[]" will be subject to MX lookups. So If I have domain.x, I can configure the transport_maps like this::
domain.x smtp:domain.x:25 and postfix makes MX lookups automatically. De: Arantza Serrano Enviado el: lunes, 13 de mayo de 2013 7:38 Para: 'postfix-users@postfix.org' Asunto: Split domain and DNS queries Hello, I need to configure some domains to be splitting temporarily. There can be some accounts in my postfix platform and some others accounts in the old platform. So I need that when a postfix account of the domain X sends a mail to a account of the other platform, the Postfix can do a DNS query (the MX records of the domain X) and it can relay the email to the old platform. How can I configure this? I know that if I know in advance the IP of the old platform, I can configure the transport_maps with the IP of the old platform. But this old platform could be a lot of servers depending domain. So I need configure the Psotfix to be "intelligent" and it can do its own DNS querys to look for the MX records of each domain. Thanks and regards
