定时发送邮件

dnf install s-nail -y

vim /etc/s-nail.rc

set from=3578815894@qq.com
set smtp=smtp.qq.com
set smtp-auth-user=3578815894@qq.com
set smtp-auth-password=pwzmndsuktrmcgih
set smtp-auth=login

因为需要 QQ 邮箱的 SSL 证书，所以我们还需要手动的获取QQ 邮箱的证书保存到本地指定的目录里以备调用和验证，具体命令如下：

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：

cd /root/.certs
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.

验证测试

[root@localhost .certs]# echo 123 | mail -s test 1065372838@qq.com

echo 123 |mail -s “邮件” 3578815894@qq.com

crontab -e -u root

12 12 * * * /usr/bin/touch /file

如出现如图情况最好转用163邮箱方法如上