While sending an email using s-nail we can override the 'FROM' address using below -

echo test|s-nail -v -r <overidden_FROM_address> -s subj  <TO_email_address>  

But customer want to get the actual sender details (user@hostname ) somewhere in the email.

As we know by-default s-nail will use the FROM address as 'user@hostname', can we append this in the email header or anywhere else while sending the emails so that the actual user who send the email is preserved?