邮件服务器：
MUA：邮件用户代理 foxmail outlook
MTA：邮件传输代理 sendmail postfix
MDA：邮件投递代理
SMTP：简单邮件传输协议
postfix
安装：
yum install postfix
配置文件：
/etc/postfix/main.cf
端口：25
启动服务：systemctl restart postfix
日志：/var/log/maillog
邮件保存位置：/var/spool/mail/
配置：
[root@localhost ~]# hostnamectl set-hostname mail.tong.com
[root@localhost ~]# vim /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.206.20 mail.tong.com
配置发送
vim /etc/postfix/main.cf
myhostname = mail.tong.com
mydomain = tong.com
inet_interfaces = all
#inet_interfaces = localhost
systemctl restart postfix测试：
yum install telnel
[root@localhost ~]# telnet mail.tong.com 25 #连接25端口
Trying 192.168.206.20...
Connected to mail.tong.com.
Escape character is '^]'.
220 mail.tong.com ESMTP Postfix
ehlo mail.tong.com ------------------------------------------- 和服务器测试连接
250-mail.tong.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
mail from:[email protected] ----------------------------------- 发件人
250 2.1.0 Ok
rcpt to:[email protected] ---------------------------------------- 收件人
250 2.1.5 Ok
data --------------------------------------------------------------------------内容
354 End data with <CR><LF>.<CR><LF>
hello i am tong!!!!!!
. ---------------------------------------------------------------------------------------结束
250 2.0.0 Ok: queued as EFB753165BF3
quit -------------------------------------------------------------------------- 退出
221 2.0.0 Bye非交互式
echo 123456 | mail -s test [email protected][root@localhost ~]# su - tong
上一次登录：四 11月 25 19:32:10 CST 2021pts/0 上
[tong@mail ~]$ mail
Heirloom Mail version 12.5 7/5/10. Type ? for help.
"/var/spool/mail/tong": 1 message 1 new
>N 1 [email protected] Thu Nov 25 19:30 10/361
& 1
Message 1:
From [email protected] Thu Nov 25 19:30:39 2021
Return-Path: <[email protected]>
X-Original-To: [email protected]
Delivered-To: [email protected]
Status: R
hello i am tong!!!!!!!!!!!!!!!!
&
接受邮件：
安装软件：
yum install dovecot
配置文件：
/etc/dovecot/dovecot.conf
/etc/dovecot/conf.d/
端口：pop3：110 imap：143
启动服务：systemctl restart dovecot
配置：
vim /etc/dovecot/dovecot.conf
protocols = imap pop3 lmtp
vim /etc/dovecot/conf.d/10-mail.conf
mail_location = mbox:~/mail:INBOX=/var/mail/%u
mkdir -p /home/zorro/mail/.imap/INBOX
chown -R zorro.zorro /home/zorro/