cetnos 7 + postfix 新增dkim功能

  1. 安裝

rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
yum install -y opendkim

  1. 產生private key與dns的TXT Record

opendkim-genkey -d <domain name>
cp default.* /etc/opendkim/keys
chown -R opendkim:opendkim /etc/opendkim

  1. 修改/etc/opendkim.conf
    確認該設定檔案有以下的設定( KeyFile /etc/opendkim/keys/default.private 要mark起來 )

Mode sv
Socket inet:8891@127.0.0.1
Canonicalization relaxed/simple
Domain <domain name>
#KeyFile /etc/opendkim/keys/default.private
KayTable refile:/etc/opendkim/KeyTable
SigningTable refile:/etc/opendkim/SigningTable
ExternalIgnoreList refile:/etc/opendkim/TrustedHosts
InternalHosts refile:/etc/opendkim/TrustedHosts

  1. 修改 /etc/opendkim/KayTable

default._domainkey.<domain name> <domain name>:default:/etc/opendkim/keys/default.private

以 test.com 為例子

default._domainkey.test.com test.com:default:/etc/opendkim/keys/default.private

  1. 修改 /etc/opendkim/SigningTable

*@<domain name> default._domainkey.<domain name>

以test.com為例子

*@test.com default._domainkey.test.com

  1. 修改 /etc/opendkim/TrustedHosts

127.0.0.1
<mail host name>
<domain name>

以 test.com 為例子

127.0.0.1
mail.test.com
test.com

  1. 新增以下設定 /etc/postfix/main.cf

smtpd_milters = inet:127.0.0.1:8891
non_smtpd_milters = $smtpd_milters
milter_default_action = accept

  1. 啟用service

systemctl start opendkim ; systemctl enable opendkim ; systemctl restart postfix

  1. 測試
    • opendkim-testkey -x /etc/opendkim.conf 若無錯誤訊息代表成功
    • 測試網站 https://www.appmaildev.com/

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