- Does RHEL support SPF (Sender Policy Framework)?
- How to use SPF (Sender Policy Framework) in postfx and sendmail.
- Getting the following error when trying to send email from the MTA:
'Received-SPF: fail (domain of <domain> does not designate <IP Address> as permitted sender)'.
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 6
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