CentOS使用465端口发送邮件

1）邮件发送示例

方法1：echo "This is a test mail" | mail -s '邮件测试' 452666750@qq.com
方法2：mail -s '服务运行报告' 452666750@qq.com < /root/messages.txt

2）网易邮箱证书申请

mkdir /root/.certs
echo -n | openssl s_client -connect smtp.163.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ~/.certs/163.crt
certutil -A -n "GeoTrust Global CA" -t "C,," -d ~/.certs -i ~/.certs/163.crt
certutil -A -n "GeoTrust SSL CA" -t "C,," -d ~/.certs -i ~/.certs/163.crt
certutil -L -d /root/.certs
certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ~/.certs/ -i ~/.certs/163.crt

3）网易邮箱配置示例

set ssl-verify="ignore"
set smtp-auth="login"
set from="mds302587@163.com"
set smtp="smtps://smtp.163.com:465"
set smtp-auth-user="mds302587@163.com"
set smtp-auth-password="djbhbhyhzedfcaij"
set nss-config-dir="/root/.certs"

4）QQ邮箱证书申请

mkdir /root/.certs
echo -n | openssl s_client -connect smtp.qq.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ~/.certs/qq.crt
certutil -A -n "GeoTrust Global CA" -t "C,," -d ~/.certs -i ~/.certs/qq.crt
certutil -A -n "GeoTrust SSL CA" -t "C,," -d ~/.certs -i ~/.certs/qq.crt
certutil -L -d /root/.certs
certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ~/.certs/ -i ~/.certs/qq.crt

5）QQ邮箱配置示例

set ssl-verify="ignore"
set smtp-auth="login"
set from="452666750@qq.com"
set smtp="smtps://smtp.qq.com:465"
set smtp-auth-user="452666750@qq.com"
set smtp-auth-password="djbhbhyhzedfcaij"
set nss-config-dir="/root/.certs"

6）阿里邮箱证书申请

mkdir /root/.certs
echo -n | openssl s_client -connect smtp.aliyun.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ~/.certs/ali.crt
certutil -A -n "GeoTrust Global CA" -t "C,," -d ~/.certs -i ~/.certs/ali.crt
certutil -A -n "GeoTrust SSL CA" -t "C,," -d ~/.certs -i ~/.certs/ali.crt
certutil -L -d /root/.certs
certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ~/.certs/ -i ~/.certs/ali.crt

7）阿里邮箱配置示例

set ssl-verify="ignore"
set smtp-auth="login"
set from="mds302587@aliyun.com"
set smtp="smtps://smtp.aliyun.com:465"
set smtp-auth-user="mds302587@aliyun.com"
set smtp-auth-password="djbhbhyhzedfcaij"
set nss-config-dir="/root/.certs"

8）邮件发送总结

1、配置hosts映射、并安装Postfix服务、安装完成以后在 /etc/postfix/main.cf 配置文件当中进行相应的参数修改

2、安装mailx工具、它用来发送邮件

3、按照上面申请示例、在可以访问外网的服务器上申请证书即可、配置基本一样、可以直接复制粘贴

3、申请完证书以后、编辑 /etc/mail.rc 配置文件、将上面的配置示例添加到底部即可、配置示例均为发件人

4、mail.rc 这个配置文件、只有安装了mailx 工具之后才有

【只是为了打发时间】