DKIM private key, permissions?

I'm testing e-mail server and created DKIM keys with ISPConfig. I discovered the private key is automatically set up so Amavis can use it, but noticed the file permissions for the file allow reading for others. Should it be only owner and group can read since I assume the private part of the key must be kept secret.

Code:

# ls -lh /var/lib/amavis/dkim/
total 8.0K
-rw-r--r-- 1 amavis amavis 1.7K Aug 29 19:04 taleman.ovh.private
-rw-r--r-- 1 amavis amavis  451 Aug 29 19:04 taleman.ovh.public

I did chmod o-r to the .private file.

 

You don't need this. See the permissions for /var/lib/amavis:

Code:

drwxr-x---  7 amavis       amavis       4096 Sep 20 10:36 amavis