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Postfix dkim and spf filtering

Installing OpenDKIM: yum install opendkim Create private and public key: mkdir /etc/opendkim/keys/myhostname.lt /usr/sbin/opendkim-genkey -D /etc/opendkim/keys/myhostname.lt/ -d myhostname.lt -s default chown -R root:opendkim /etc/opendkim/keys/myhostname.lt chmod 640 /etc/opendkim/keys/myhostname.lt/default.private chmod 644 /etc/opendkim/keys/myhostname.lt/default.txt