linux配置qq邮箱发邮件

1.安装mailx
yum -y install mailx

2.配置mail
vim /etc/mail.rc

set from=xxxxxx@qq.com
set smtp=smtps://smtp.qq.com:465
set smtp-auth-user=xxxxxx@qq.com
set smtp-auth-password=你的 QQ 邮箱授权码
set smtp-auth=login
#set smtp-use-starttls 这里是不需要配置的，很多地方没说明，配置了反而会验证失败，所以我注释掉；
set ssl-verify=ignore
set nss-config-dir=/root/.certs

3.配置QQ邮箱的SSL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 -L -d /root/.certs

为了防止出现前文所说的发送邮件警告提示，还需要进入邮箱 SSL 证书存放目录 /root/.certs 里执行如下命令：
certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ./ -i qq.crt
返回如下提示即可：
**Notice: Trust flag u is set automatically if the private key is present.**

4.通过命令行发送测试邮件
mailx -s "邮箱测试" xxxx@qq.com < message_file.txt