How to override /etc/mailname and force a given from address using nullmailer-injector?

[Jibun-no-Kage]

How to override /etc/mailname and force a given from address or even /etc/nullmailer/adminaddr using nullmailer-injector? I send the following test... and email system rejects it because root@. apparently read from /etc/mailname, is always used. I want the from and to email address to be honored in the data file I pipe into the injector, how does one do this?

`
cat /tmp/mail.tmp
From: [email protected]
To: [email protected]
Subject: This is a test!

This is a test!

cat /tmp/mail.tmp | nullmailer-inject -h
`

But SMTP server rejects mail sent, because the sender is [email protected], i.e. /etc/mailname is server.dd.org. The adminaddr is [email protected], but it is never honored or referenced?