[Exim] Wrong Sender Address

Hello,

I've got a configuration problem, when a send a message to outside on my
net the address
who send de message is mail@??? and should be ernesto@??? a
user
who i've had configured in the local intranet and in the internet, see the
log below, what
could be wrong in my configuration ? i'm using version 3.22

2001-04-04 08:06:52 14kiJX-0000IG-00 <= mail@??? U=mail
P=local-esmtp S=
594
id=3ACAFFE2.E5257295@???
2001-04-04 08:06:53 14kiJX-0000IG-00 => lekap@??? R=lookuphost
T=remote_sm
tp H=mx.ig.com.br
[200.226.132.3]
2001-04-04 08:06:53 14kiJX-0000IG-00 Completed

my exim.conf version 3.22