[root@localhost ~]# rpm -qa | grep dovecot

[root@localhost ~]# yum install -y dovecot

Installed:

  dovecot.i686 1:2.0.9-22.el6                                                           

Complete!

[root@localhost ~]# 

[root@localhost ~]# gedit /etc/dovecot/dovecot.conf

protocols = imap pop3 lmtp    //這行默認被注釋了，必須去掉注釋。這里表示啟用了imap pop3 lmtp協議

listen=*     //監聽所有的ipv4接口

login_trusted_networks = 192.168.0.0/24     //允許登錄的網段

[root@localhost pub]# gedit /etc/dovecot/conf.d/10-mail.conf

# mbox是內部郵箱，屬于dovecot持有。而通常IMAP協議支持多種郵箱，因此其他郵箱的內容就存儲在/var/mail/%u

mail_location = mbox:~/mail:INBOX=/var/mail/%u

[root@localhost ~]# su david      //切換到david

[david@localhost root]$ cd /home/david/    //跳轉到家目錄

[david@localhost ~]$ mkdir -p mail/.imap/INBOX     //創建郵件目錄

[root@localhost ~]# gedit /etc/sysconfig/iptables

-A INPUT -m state --state NEW -m tcp -p tcp --dport 110 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 143 -j ACCEPT

[root@localhost ~]# service iptables restart

iptables：將鏈設置為政策 ACCEPT：filter nat                [確定]

iptables：清除防火墻規則：                                 [確定]

iptables：正在卸載模塊：                                   [確定]

iptables：應用防火墻規則：                                 [確定]

iptables：載入額外模塊：nf_conntrack_ftp                   [確定]

[root@localhost ~]# service dovecot start

正在啟動 Dovecot Imap：                                    [確定]

[root@localhost ~]# 

[root@localhost ~]# netstat -tunlp | grep 110

tcp        0      0 0.0.0.0:110                0.0.0.0:*                  LISTEN      2650/dovecot        

tcp        0      0 :::110                     :::*                       LISTEN      2650/dovecot        

[root@localhost ~]# netstat -tunlp | grep 143

tcp        0      0 0.0.0.0:143                 0.0.0.0:*                   LISTEN      2650/dovecot        

tcp        0      0 :::143                     :::*                       LISTEN      2650/dovecot  

[root@localhost ~]# telnet 192.168.0.113 143     //ip就是服務器地址，143是imap的端口

Trying 192.168.0.113...

Connected to 192.168.0.113.

Escape character is '^]'.

* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE STARTTLS AUTH=PLAIN] Dovecot ready.       //到這里說明可以連接了

a login david 543092             //這是登錄操作，用戶名david，密碼543092。這條命令需要用戶輸入

a OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS] Logged in       //登錄成功