An "empty domain" sender usually refers to a mail address without domain information, f.e. <user> rather than a null sender <>. See append_at_myorigin (default: yes) configuration parameter.
> On May 15, 2019, at 6:24 PM, Peter Fraser <softwareinfo...@gmail.com> wrote: > > Hi All > We had an auditor to an internal pentest for our network. The result for our > Postfix box was (My Words) Although your SMTP server prevents relay in some > circumstances, it still allows email from an empty domain. I am aware that > the empty domain <> is needed for bounce messages. Is there a way to prevent > an initial email out form an empty domain but still allow Postfix to use it > internally for bounce messages? > > > Thanks and Regards > SI
