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Setting up different mail server for one domain in zpanel
[Not Solved] Setting up different mail server for one domain in zpanel
I have two domains in zpanel server:

There are many email accounts which belong to these domains. In this example I am using

When I use same local mail server and send email from one email to another is not a problem. But when I change mail server of to another server for example to microsoft office 365 then I can't send email from to

Below is the error I am getting:

SMTP Error (450): Failed to add recipient "" (4.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table).

How can I solve this problem? I think zpanel is looking for local server to deliver mail.

I tried following:

created /etc/postfix/transport and inserted following:

$ postmap /etc/postfix/transport
then uncommented transport_maps = hash:/etc/postfix/transport in /etc/postfix/ and at last restarted postfix.
Thanks given by:

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