在Ubuntu上配置DKIM(DomainKeys Identified Mail)签名可以帮助提高邮件的安全性和可信度。以下是一个基本的步骤指南,帮助你在Ubuntu上配置DKIM签名:
首先,你需要安装一个DKIM签名工具,比如opendkim
。
sudo apt update
sudo apt install opendkim opendkim-tools
使用opendkim-genkey
命令生成DKIM密钥对。
sudo opendkim-genkey -t -s mail -d yourdomain.com
-t
:生成测试密钥。-s
:指定选择器名称(例如mail
)。-d
:指定域名(例如yourdomain.com
)。这将在/etc/opendkim/keys/yourdomain.com/mail.private
生成私钥,在/etc/opendkim/keys/yourdomain.com/mail.txt
生成公钥。
编辑OpenDKIM的配置文件/etc/opendkim.conf
。
sudo nano /etc/opendkim.conf
添加或修改以下配置:
Domain yourdomain.com
Selector mail
PrivateKey /etc/opendkim/keys/yourdomain.com/mail.private
在DNS管理界面中添加一个TXT记录,用于验证DKIM签名。
mail._domainkey
v=DKIM1; k=rsa; p=YOUR_PUBLIC_KEY
例如:
v=DKIM1; k=rsa; p=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