How to confirm if postfix acting as an openrelay ?
Issue
- How to verify if postfix is acting as an open-relay or not ?
- Does the default configuration of
postfix.serviceinRed Hat Enterprise Linuxacts as an openrelay ? - How to disable the
postfix.servicefrom running as an open-relay ?
Environment
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- postfix
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