Pipe mails from remote mail server (Postfix) to Zammad

Hello,
is it possible to pipe mails from a remote Postfix server directly into Zammad? I read the docs and found this command
rails r 'Channel::Driver::MailStdin.new(trusted: true)'
but with my understanding this only works when Zammad and the mail server are on the same server.
So my question is if it is also possible to make use of this command when the mail server is on a different server.

Thanks and best regards