阿里云服务器使用465端口发送邮件

关闭所有邮件服务

一、生产一系列证书

mkdir  ~/.certs
#生成证书
echo -n | openssl s_client -connect smtp.163.com:465 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > ~/.certs/mail.crt

certutil -A -n "GeoTrust SSL CA" -t "C,," -d ~/.certs -i ~/.certs/mail.crt
certutil -A -n "GeoTrust Global CA" -t "C,," -d ~/.certs -i ~/.certs/mail.crt

certutil -A -n "GeoTrust SSL CA - G3" -t "Pu,Pu,Pu" -d ~/.certs -i ~/.certs/mail.crt
#查看
certutil -L -d /root/.certs

二、配置mail.rc文件

[root@iZhp3a7sejwabcxoz89b1yZ ~]# cat  /etc/mail.rc 
set from=xxxx@163.com  
set smtp=smtps://smtp.163.com:465  
set smtp-auth-user=xxx@163.com
set smtp-auth-password=xxxxxxxxxxxxx  
set smtp-auth=login
set ssl-verify=ignore
set nss-config-dir=/root/.certs

三、测试

yum install -y  exim mailx
systemctl  start exim.service 
 mailx -s 'aa' xxxx@163.com  </etc/hosts