What is the message "FEATURE(`promiscuous_relay') configures your system as open relay. Do NOT use it on a server that is connected to the Internet!" means?
Issue
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What is the meanings of the below message ?
*** WARNING: FEATURE(`promiscuous_relay') configures your system as open relay. Do NOT use it on a server that is connected to the Internet!
Environment
- Red Hat Enterprise Linux
- Sendmail
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