How to configure sendmail to only allow outgoing mail to a specific domain name?
Issue
- How to configure sendmail to only allow outgoing mail to a specific domain name? Users should be allowed to send emails addressed to any user at example.com but emails addressed to any other domain should be discarded.
Environment
- Red Hat Enterprise Linux (RHEL) 5
- Red Hat Enterprise Linux (RHEL) 6
- sendmail
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