Sendmail "from" is not from the userID sending

UNIX AIX
1

On one of my servers (AIX 7.1 sendmail=V10/Berkeley) When I login and sudo su to a serviceID and send a test email, the from header shows as being from my loginID and not the serviceID. I have a second server (AIX 6.1 sendmail=V9/Berkeley) where following the same steps the email head has the service ID as the "from:" info. I have compared the sendmail.cf files for both servers and have attempted to mitigate the differences (setting local host on the V10 server). I also attempted to insert a couple of lines from the V9 file into the V10 file that were not present but sendmail didn't like the older syntax.
code added:

# Added for AIX the next 2 lines
R</C=$+>                $@<@$j.>:/C=$1
R/C=$+<@$+>             $@<@$j.>:/C=$1
2

There is the "From " envelope (first line) and the "From: " in the header.
Both values should be constructed from the $g macro that should be the effective user ID (where sudo/su switches to):

O UnixFromLine=From $g $d

H?F?From: $?x$x <$g>$|$g$.
2 Likes
3

Thanks MadeInGermany. Both of my sendmail.cf files have both of those bits of code.

To be clear: the desired behavior is for the email to arrive from the serviceID/appID that was sudo su'd to. Not the human userID sudo su'd from. i.e. if I login as lcarpenter and sudo su - orainst1 and then send an email... the from information in the email should only indicate "orainst1".

4

How do you send the test mail?
Try this one, with only sendmail and verbose

echo "hello world" | /usr/lib/sendmail -v yourrecipient@youraddress

Any error message?
Any difference in the received mails!