> On Apr 18, 2019, at 5:47 AM, Thorsten Schöning <tschoen...@am-soft.de> wrote: > > So, is there some way to get "header_from_format = standard" of > Postfix 3.3 in Postfix 3.1?
You can install Postfix 3.3 or later. But if all you want is to see which machine "root" send an email from, see the template null-client configuration in: http://www.postfix.org/MULTI_INSTANCE_README.html#quick -- Viktor.
