比赛

Postfix

sdskill.org 的邮件发送服务器

支持smtps(465)协议连接，使用Rserver颁发的证书,证书路径/CA/cacert.pem;

创建邮箱账户“user1~user99”（共99个用户），密码为Chinaskill20!

Dovecot

sdskill.org 的邮件接收服务器；

支持imaps（993）协议连接，使用Rserver颁发的证书，证书路径/CA/cacert.pem；

请保留至少两个用户已成功登录并能正常收发邮件，以方便测试。

yum -y install openssl
mkdir /CA
cd /CA     //进入证书目录
mkdir certs
mkdir newcerts
mkdir private
touch index.txt
openssl genrsa -out private/mail.key 4096     //生成密钥
openssl genrsa -out private/dov.key 4096     //生成密钥
openssl req -new -key private/mail.key -out certs/mail.csr   //生成证书请求文件
openssl req -new -key private/dov.key -out certs/dov.csr   //生成证书请求文件

//Rserver颁发证书
Scp root@172.16.100.202:/CA/certs/mail.csr /CA/     //拿到证书请求文件
Scp root@172.16.100.202:/CA/certs/dov.csr /CA/			//拿到证书请求文件
cd /CA/
openssl ca -keyfile private/cacert.pem -cert cacert.pem -in mail.csr -out mail.pem //颁发证书
openssl ca -keyfile private/cacert.pem -cert cacert.pem -in dov.csr -out dov.pem	//颁发证书
//如果出现错误编号2是因为你颁发的证书跟前面的证书的CN名字相同
rm -rf index.txt
touch index.txt    //重新编写index.txt

//mail拿回证书
Scp root@10.10.100.254:/CA/mail.pem /CA/ 
Scp root@10.10.100.254:/CA/dov.pem /CA/ 

yum -y install dovecot    //安装邮件接收服务
vim /etc/postfix/main.cfmyhostname = mail.sdskills.org    //本机主机名75行mydomain = sdskills.org			//服务器域名83行myorigin = $mydomain      //初始域名99行inet_interfaces = all		 //网卡选择113行#inet_interfaces = $myhostname, localhost    //注释掉115行#inet_interfaces = localhos    //注释掉116#mydestination = $myhostname, localhost.$mydomain, localhost   //注释掉164行mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain	//取消注释165行mynetworks = 0.0.0.0/0    //以下网段可以通过264行home_mailbox = Maildir/     //邮件目录，在用户家目录下419行//在最后一行添加启用证书认证跟指定证书文件目录smtpd_use_tls = yessmtpd_tls_cert_file = /CA/mail.pemsmtpd_tls_key_file = /CA/private/mail.keyvim /etc/postfix/master.cf#smtp      inet  n       -       n       -       -       smtpd  //注释11行，关闭25端口smtps     inet  n       -       n       -       -       smtpd  //取消注释26行，开启465端口-o smtpd_tls_wrappermode=yes	//取消注释28行，开启证书认证

vim /etc/dovecot/dovecot.confprotocols = imaps    //24行，启用imapslisten = *   //30行,监听所有login_trusted_networks = 0.0.0.0/0  //48行，信任所有
vim /etc/dovecot/conf.d/10-auth.confdisable_plaintext_auth = no    //10行，开启明文身份认证
vim /etc/dovecot/conf.d/10-mail.confmail_location = maildir:~/Maildir    //24行取消注释，邮箱用户在家目录上自动创建Maildir目录
vim /etc/dovecot/conf.d/10-ssl.confssl = yes   //8行ssl_cert = </CA/dov.pem     //14行，指定证书文件路径ssl_key = </CA/private/dov.key   //15行，指定证书密钥路径

for i in $(seq 1 99);do useradd user$i;done     //创建user（1-99）
for i in $(seq 1 99);do echo "Chinaskill22"|passwd --stdin user$i;done  //为user（1-99）设置密码，密码为Chinaskill22
systemctl restart postfix.service     //重启邮件发送服务
systemctl restart dovecot			//重启邮件接收服务

客户端

yum -y install thunderbird    //安装邮件客户端
vim /etc/hosts172.16.100.202 smtp.sdskills.com172.16.100.202 imap.sdskills.com    //因为DNS没有添加此域名，需要手动添加

telnet localhost 25
mail from:<zzmail1>
rcpt to:<zzmail2>
datazzmail1@zzcity.com->zzmail2@zzcity.com.cat /home/zzmail2/Maildir/new/1675959826.Vfd00I319211eM781944.localhost.localdomain