How to configure a relay host in Postfix
Issue
- Postfix needs to be configured on a local machine to use an existing SMTP relay on a network. Or,
- Postfix needs to be configured on a local machine which is on an intranet where the internal DNS uses no MX records.
- How to configure a Postfix relay host?
- How to configure a relay host or relay gateway in postfix?
- How can a Postfix relay host be configured?
- How can Postfix relay mail to a relay mail server?
- How to configure Postfix as a relay client?
Environment
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Postfix
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