Startup error after postfix installation, scan_dir_fatal, permission denied, cannot open file and other errors

Since a postfix was installed before, and then uninstalled and installed again, some files have insufficient permissions, which may be the problem of the user group. This part of the files is mainly some files in the directory /var/spool/postfix.

Use the following command

chmod 755 -R /var/spool/postfix can make these files open permissions, so use postfix start to start postfix.



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