Hi, We currently have mail infrastructure setup like:
mail.domain.co.za (primary in our dc) ptamail.domain.co.za (pta office) jhbmail.domain.co.za (jhb office) Currently we use mail.domain.co.za as the outgoing server for all users, but I want to change that so that user will use $branchmail.domain.co.za as outgoing per branch to save on bandwidth. Doing that, and then sending a mail from ptau...@domain.co.za to jhbu...@domain.co.za results in: Message sending failed since the following recipients were rejected by the server: jhbu...@domain.co.za (The server responded: ": Recipient address rejected: User unknown in local recipient table" This is a temporary failure. You may try again later.) Which makes sense as jhbuser only exists on jhbmail.domain.co.za as a user account. mail.domain.co.za knows about all accounts via the aliases file. How can I configure postfix on ptamail.co.za to relay mail through mail.domain.co.za only when the user is not found locally? I've tried simply setting: fallback_transport = mail.domain.co.za But it doesn't take effect, perhaps something else is taking precedence and I need to do more configuration? Perhaps there is another way to do this instead? Much appreciated. Pieter Steyn
