Changing root@localhost to root@domain.com

[Stingreen]

How can I change this boring root@localhost thing to
something like root@domain.com?
Not only it's boring, even some email servers won't accept my mail.
Any help appreciated,
Thank you.

 

[Guest_imported]

go to sendmail.cf and find the format of headers section and change the line that begins HReceived:
to HReceivedfrom root@yourdomain.com)

eg.

#########################
# Format of headers #
#########################

H?P?Return-Path: <$g>
HReceivedfrom root@yourdomain.com)
$.$?{auth_type}(authenticated$?{auth_ssf} (${auth_ssf} bits)$.)
$.by $j ($v/$Z)$?r with $r$. id $i$?{tls_version}
(using ${tls_version} with cipher ${cipher} (${cipher_bits} bits) verified ${verify})$.$?u
for $u; $|;
$.$b$?g
(envelope-from $g)$.