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Postfix Documentation
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Installing a pre-built Postfix package

  • To unpack a pre-built Postfix package, execute the equivalent of:

    # umask 022
    # gzip -d <outputfile.tar.gz | (cd / ; tar xvpf -) 

    The umask command is necessary for getting the correct permissions on non-Postfix directories that need to be created in the process.

  • Create the necessary mail_owner account and setgid_group group for exclusive use by Postfix.

  • Execute the postfix command to set ownership and permission of Postfix files and directories, and to update Postfix configuration files. If necessary, specify any non-default settings for mail_owner or setgid_group on the postfix command line:

    # postfix set-permissions upgrade-configuration \
           
    setgid_group=xxx 
    mail_owner=yyy
    

    With Postfix versions before 2.1 you achieve the same result by invoking the post-install script directly.

Postfix Documentation
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