Opendkim installed on centos 7 but not signing emails

[muhdragab]

I know this is not necessary sentora related. But I hope you can help me with

I have installed opendkim with postfix on centos 7 using this tutorial https://technologyand.me/2016/12/12/conf...h-postfix/ (added the dns record and everything) Yet my outgoing emails are not signed I have checked opendkim status and this what comes out:

Jan 08 01:45:43 zpanel.sisd-azhar.com opendkim[2648]: A7E694197F: DKIM verification successful
Jan 08 02:02:48 zpanel.sisd-azhar.com opendkim[2648]: DDEA541981: bay004-omc1s10.hotmail.com [65.54.190.21] not internal
Jan 08 02:02:48 zpanel.sisd-azhar.com opendkim[2648]: DDEA541981: not authenticated
Jan 08 02:02:48 zpanel.sisd-azhar.com opendkim[2648]: DDEA541981: failed to parse authentication-results: header field
Jan 08 02:02:48 zpanel.sisd-azhar.com opendkim[2648]: DDEA541981: DKIM verification successful
Jan 08 02:14:06 zpanel.sisd-azhar.com opendkim[2648]: default._dkim.sisd-azhar.com: key data is not secure: /etc/opendkim/keys/sisd-azhar.com/default.private is in group 12 which has multiple users (e.g. "mail")
Jan 08 02:14:06 zpanel.sisd-azhar.com opendkim[2648]: 367E54197E: error loading key 'default._dkim.sisd-azhar.com'
Jan 08 05:30:30 zpanel.sisd-azhar.com opendkim[2648]: E9B2541974: o1.support.paptap-apps.com [167.89.92.139] not internal
Jan 08 05:30:30 zpanel.sisd-azhar.com opendkim[2648]: E9B2541974: not authenticated
Jan 08 05:30:30 zpanel.sisd-azhar.com opendkim[2648]: E9B2541974: DKIM verification successful


How to fix these errors?