Why does sendmail change the username for the root user (/proc/self/loginuid)?
Issue
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Why do messages from the "root" user show as a different username?
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Mail is delivered as the user that had logged in to the system, even after switching to root. This happens on a RHEL 6 system with sendmail configured as the MTA and using mail/mailx as the MUA. The problem does not manifest on a RHEL 5 system, or RHEL 6/postfix/mailx and RHEL 6/sendmail/mutt combination.
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Sending an email with
sudo su -shows the incorrect user in thefromaddress -
/proc/self/loginuid is configured with a value other than "0" and sendmail changes the root users "from" address
Environment
- Red Hat Enterprise Linux 6
- Sendmail
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