我很难调试这个错误：
系统日志：
Apr 24 06:18:08 abcex opendkim[24223]: abcex: key data is not secure: /etc/opendkim/keys/abcex.private
Apr 24 06:18:08 abcex opendkim[24223]: 28E1C29C5FB: error loading key 'abcex'
pr 24 06:18:08 abcex postfix/cleanup[24394]: A21DE29C5FB: milter-reject: END-OF-MESSAGE from localhost[127.0.0.1]: 4.7.1 Service unavailable - try again later; from=<root@abcex.com> to=<admin@abcex.com>
这是 namei -l /etc/opendkim/keys/abcex.private 的输出
drwxr-xr-x root root /
drwxr-xr-x root root etc
drwxr-xr-x opendkim opendkim opendkim
drwxr-xr-- opendkim opendkim keys
-rwxr-xr-- opendkim opendkim abcex.private
然而测试工作正常：
opendkim-testkey -d abcex.com -s 201804 -vvv
opendkim-testkey: using default configfile /etc/opendkim.conf …