Show the default value of one Postfix parameter
Build a paste-ready command, then review its compatibility and effects before running it.
postconf -d <postfix-parameter>Complete required fields to copy the generated command.
read-onlyno known side effects Compatibility
LinuxVerified for Linux using posix, bash, zsh syntax.
Operational knowledgereview due 2027-01-19
Requirementspostconfpostconf must be installed and available on PATH.
Version supportpostconf Current supported releasesVerified for linux using posix, bash, zsh syntax; consult compatibility notes for platform-specific differences.
Expected signalsmyhostname = mail.example.comRepresentative successful output; values vary with the selected target and system state.
Known errorspostconf: command not foundpostconf is missing or is not available on PATH.
Verifypostconf -d {{parameter}}The output matches the expected target and exits without an error.Rollback noteNot required: this command is read-only and does not change system state.
Command breakdown
01postconfCommandRuns the postconf stage of this one-liner.
02-dOptionConfigures postconf with the -d option.
03<postfix-parameter>ParameterA value supplied in the Fill parameters section.
Example input
postconf -d myhostname
Example output
myhostname = mail.example.com
Illustrative output — exact values vary by system and data.
Official sources
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