首先先停止其他邮件
systemctl stop postfix
service sendmail stop
systemctl stop sendmail
chkconfig sendmail off
service postfix stop
chkconfig postfix off
service sendmail stop
systemctl stop postfix 一、安装mailx邮件客户端：
yum install mailx -y
二、修改/etc/mail.rc配置文件：
set ssl-verify=ignore
set nss-config-dir=/root/.certs
set [email protected]
set smtp=smtp.qq.com
（这里虽然没写端口，但默认的是25）
set [email protected]
set smtp-auth-password=qq邮箱授权码
set smpt-auth=login
三、配置证书：
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
不需要证书的
set bsdcompat
set [email protected]
set smtp=smtp.qq.com
set [email protected]
set smtp-auth-password=xxx
set smpt-auth=login五、最后发送邮件：
echo "i am victor chen,hi" | mail -v -s "say hello" [email protected]
