postfix的dkim 需要安装opendkim

yum install opendkim -y

export domain=你的域名

mkdir /etc/opendkim/keys/$domain

cd /etc/opendkim/keys/$domain

opendkim-genkey -d $domain -s default

chown -R opendkim:opendkim /etc/opendkim/keys/$domain

echo “default._domainkey.$domain $domain:default:/etc/opendkim/keys/$domain/default.private” >> /etc/opendkim/KeyTable

echo “*@$domain default._domainkey.$domain“ >> /etc/opendkim/SigningTable

#编辑opendkim配置文件

vi /etc/opendkim.conf

Mode sv

KeyFile /etc/opendkim/keys/default.private  这句好像是默认的

KeyTable /etc/opendkim/KeyTable

SigningTable refile:/etc/opendkim/SigningTable

ExternalIgnoreList refile:/etc/opendkim/TrustedHosts

InternalHosts refile:/etc/opendkim/TrustedHosts

#（可选设置）如果要在邮件头信息中输出软件版本，请按如下方式更改参数。

DKIM-Filter: OpenDKIM Filter v2.11.0 mail.wptmdb.com 8D19A3075E24

SoftwareHeader no     yes 改为 no

 

 

 

systemctl restart opendkim

systemctl restart postfix

systemctl enable opendkim

postfix还需要添加一下参数

vi /etc/postfix/main.cf

### DKIM Settings

smtpd_milters = inet:127.0.0.1:8891

non_smtpd_milters = $smtpd_milters

milter_default_action = accept