[开发工具]Linux个人机器使用465发送邮件

云服务器默认关闭了25端口，现改用465端口，需要证书，需要下载

关闭其它的邮件工具
service sendmail stop
service postfix stop

向qq请求证书
mkdir -p /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 SSL CA" -t "C,," -d ~/.certs -i ~/.certs/qq.crt
certutil -A -n "GeoTrust Global CA" -t "C,," -d ~/.certs -i ~/.certs/qq.crt
certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ~/.certs/./ -i qq.crt
certutil -L -d /root/.certs

默认是有mailx的，直接更改配置文件，末尾追加
vim /etc/mail.rc

set from=xxx@qq.com #之前设置好的邮箱地址
set smtp=smtps://smtp.qq.com:465 #邮件服务器
set smtp-auth-user=xxx@qq.com #之前设置好的邮箱地址
set smtp-auth-password=xxxx #授权码
set smtp-auth=login #默认login
set ssl-verify=ignore #ssl认证方式
set nss-config-dir=/root/.certs #证书所在目录

发送邮件测试
echo “邮件正文” | mail -s “邮件主题” xxx@qq.com