SMTP，：（Simple Mail Transmission Protocol）简单邮件传输协议，TCP 25端口,smtps

POP3，（Post Office Protocol）第3版邮局协议，TCP 110端口,pops

IMAP4，（Internet Mail Access Protocol）因特网消息访问协议，TCP 143端口,imaps

Mine    ，MIME：（Multipurpose Internet Mail Extensions）多用途、多功能互联网邮件扩展：以文本的方式对二进制数据做重新编码，并能够实现以文本协议发送二进制数据。常用编码编码方式：base64.。

Linux下mail服务器应用之邮件系统

v 商业邮件系统

ü Exchange：微软公司的重量级产品，与Windows系列软件产品相集成，协作性较好

ü Notes/Domino：IBM公司的商业电子邮件和办公协作软件产品，功能丰富、强大，提供跨平台支持

v 开源邮件系统

ü Sendmail：资格最古老，运行稳定，但安全性欠佳

ü Qmail：有更好的执行效率，配置、管理也很方便

ü Postfix：兼容Sendmail，采用模块化设计，在投递效率、稳定性、服务性能及安全性方面表现优秀

v Sendmail：提供邮件发送服务（SMTP）

v Dovecot：提供邮件收取服务（POP3）

v Outlook Express：用于收发信的客户端工具

Linux下mail服务器应用之邮件系统

邮件系统角色

MUA（邮件用户代理）、MTA（邮件传输代理）、MDA（邮件分发代理）、MAA（邮件访问代理）

MUA： (Mail User Agent)： 邮件用户代理：就是用户与电子邮件系统的接口，在大多数情况下就是在邮件客户端上运行的程序。

Windows：outlook express foxmail

Lnux：Thunderbird（雷鸟） evolution

MTA (Mail Transfer Agent)：邮件传输代理：主要功能发送和接收邮件，同时向发件人报告邮件的传送情况。根据用途可将邮件服务器分为邮件服务器（SMTP 服务器）和接受邮件服务器（POP3/IMAP4 服务器）。

      windows：电子邮件服务 ，exchange server，mdaemon，lotus notes Linux：sendmail（50%），postfix，qmail

MDA (Mail Delivery Agent)：邮件投递代理：到本地邮局之后，将邮件放在用户的邮箱中。可以是MTA 下面的一个小程序，也可以单独是一个软件例如procmail，maildrop。

MAA：（Mail Access Agent）（接受服务器）邮件访问代理：代为MUA 提供访问message store 并接收邮件功能的一台IMAP/POP3 服务器，常用courrier-imap ，dovecot。

Linux下mail服务器应用之邮件系统

邮件安全：

1.垃圾邮件 反垃圾邮件 SpamAssassin，认证（地址，账号），正向解析和反向

2.病毒 clamav（查毒）特征代码库

3.sendmail 邮件呼叫器 mailscanner

SASL：（Simple Authorization Secure Layer）简单认证安全层协议，用于为没有提供认证功能的协议提供认证功能。软件包：cyus-sasl，进程：saslauthd。

整合STMP，clainav（扫描病毒），SpamAssassin（apache 提供，扫描垃圾邮件）的工具成称之为caller（调用器）。常见调用器Caller：mimedefang Mailscanner amavisd-new。

邮箱类型：

mbox 所有邮件放在同一个文件中，新邮件直接追加在文件后面。

maildir 建一个目录，每一封邮件被当成一个单独文件存放在目录里

redhat 默认使用mbox 方式，sendmail 默认使用mbox，postfix 默认两种都支持。

SMIME：提供端到端的邮件加密解密协议。

sendmail邮件系统

sendmail所需软件包：

sendmail-8.13.8-2.el5.i386.rpm          #必选，主程序包

sendmail-cf-8.13.8-2.el5.i386.rpm      #必选，配置文件包

sendmail-devel-8.13.8-2.el5.i386.rpm

sendmail-doc-8.13.8-2.el5.i386.rpm

m4-1.4.5-3.el5.1.i386.rpm            #m4工具包

Sendmail服务软件包

sendmail-8.13.8-2.el5.i386.rpm：sendmail服务的主程序包，服务器端必须安装该软件包。
sendmail-cf-8.13.8-2.el5.i386.rpm：sendmail宏文件包
sendmail-devel-8.13.8-2.el5.i386.rpm：sendmail服务器开发工具软件包
sendmail-doc-8.13.8-2.el5.i386.rpm：sendmail服务器的说明文档
m4-1.4.5-3.el5.1.i386.rpm：宏处理过虑软件包
dovecot-1.0-1.2.rc15.el5.i386.rpm：接收邮件软件包，安装时需要注意安装顺序

Sendmail相关配置文档

sendmail.cf：sendmail核心配置文件，位于/etc/mail/sendmail/sendmail.cf

sendmail.mc：sendmail提供sendmail文件模板，通过编辑此文件后再使用m4工具将结果导入sendmail.cf完成配置sendmail核心配置文件，降低配置复杂度，位于/etc/mail/sendmail.mc

local-host-name：定义收发邮件服务器的域名和主机别名，位于/etc/mail/local-host-name

access.db：用来设置sendmail服务器为哪些主机进行转发邮件,位于/etc/mail/access.db

aliases.db：用来定义邮箱别名，位于/etc/mail/aliases.db

virtusertable.db：用来设置虚拟账户，位于/etc/mail/virtusertable.db

图形化webmin管理sendmail服务器：

使用webmin管理linux的sendmail服务

到webmin的官方网站下载webmin软件：

Webmin官网：http://www.webmin.com/

配置步骤：

我下载的是webmin-1.580-1.noarch.rpm我把它放到/root目录下了。

[[email protected] ~]# rpm -ivh webmin-1.580-1.noarch.rpm

[[email protected] ~]# service webmin start

[[email protected] ~]# service webmin status

Webmin (pid 5388) is running

注：webmin默认端口为10000.

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

其它资料：

①．linux中启动sendmail很慢的解决方法

linux 系统启动时，发现sendmail启动很慢，发现是/etc/hosts文件没有添另hostname名称.

1、修改之前

127.0.0.1 localhost

2、修改之后

127.0.0.1 localhost mailserver

重启系统，发现sendmail启动的进候变快了.

②．sendmail错误cannot open `/usr/share/sendmail-cf/m4/cf.m4

配置sendmail，生成配置文件时，出现以下错误：

[[email protected] mail]# m4 sendmail.mc >sendmail.cf

sendmail.mc:10: m4: cannot open `/usr/share/sendmail-cf/m4/cf.m4': No such file or directory

通过安装sendmail-cf解决

[[email protected] mail]# yum -y install sendmail-cf

③．问题：使用 命令 mail -s "sdf" [email protected] </root/install.log 发不了邮件。

查看日志报错：/var/log/maillog

My unqualified host name (localhost) unknown; sleeping for retry

问题原因：sendmail配置文件有问题。

修改sendmail配置文件

#Dj$w.Foo.COM

Djlocalhost.localdomain ------------>添加

重启sendmail

sendmail邮件系统的一个案例

实验拓扑

Linux下mail服务器应用之邮件系统

① :在mail.bj.com安装sendmail并进行简单配置

[[email protected] ~]# mkdir /mnt/cdrom

[[email protected] ~]# mount /dev/cdrom /mnt/cdrom/

mount: block device /dev/cdrom is write-protected, mounting read-only

[[email protected] ~]# cd /mnt/cdrom/Server/

[[email protected] Server]# rpm -qa |grep -E "sendmail|m4"

m4-1.4.5-3.el5.1

sendmail-8.13.8-2.el5

[[email protected] Server]# rpm -ivh sendmail-

sendmail-8.13.8-2.el5.i386.rpm          #主程序包

sendmail-cf-8.13.8-2.el5.i386.rpm           #配置工具包

sendmail-devel-8.13.8-2.el5.i386.rpm

sendmail-doc-8.13.8-2.el5.i386.rpm

[[email protected] Server]# rpm -ivh sendmail-cf-8.13.8-2.el5.i386.rpm

[[email protected] Server]# cd /etc/mail/

[[email protected] mail]# ls

Makefile     domaintable.db    mailertable.db submit.mc

access       helpfile          sendmail.cf     trusted-users

access.db    local-host-names sendmail.mc     virtusertable

domaintable mailertable       submit.cf       virtusertable.db

编辑主要配置文件：

[[email protected] mail]# vim sendmail.mc

116 DAEMON_OPTIONS(`Port=smtp,Addr=0.0.0.0, Name=MTA')dnl

[[email protected] ~]# netstat -tupln |grep sendmail

tcp        0 0 127.0.0.1:25 0.0.0.0:*                   LISTEN      3407/sendmail: acce

[[email protected] ~]# service sendmail restart

[[email protected] ~]# netstat -tupln |grep sendmail

tcp        0 0 0.0.0.0:25 0.0.0.0:*                   LISTEN      4440/sendmail: acce

中继文件：

[[email protected] mail]# vim access #增加10，11,12行

9 Connect:127.0.0.1 RELAY

10 Connect:10.106.6                        RELAY

11 bj.com                                  OK

12 sh.com                                  RELAY

表明邮件服务器的域名：

[[email protected] mail]# vim local-host-names

增加：bj.com

重新启动sendmail服务器：

[[email protected] mail]# chkconfig sendmail on

[[email protected] mail]# service sendmail restart

Shutting down sm-client:                                   [ OK ]

Shutting down sendmail:                                    [ OK ]

Starting sendmail:                                         [ OK ]

Starting sm-client:                                        [ OK ]

新建账户：

[[email protected] ~]# useradd user1

[[email protected] ~]# useradd user2

[[email protected] ~]# echo "123" |passwd --stdin user1

[[email protected] ~]# echo "123" |passwd --stdin user2

② ：搭建dns服务器，并作相关配置：

[[email protected] ~]# cd /mnt/cdrom/Server/

[[email protected] Server]# rpm -ivh bind-9.3.4-10.P1.el5.i386.rpm

[[email protected] Server]# rpm -ivh bind-chroot-9.3.4-10.P1.el5.i386.rpm

[[email protected]]# rpm -ivh caching-nameserver-9.3.4-10.P1.el5.i386.rpm

[[email protected] Server]# cd /var/named/chroot/etc/

[[email protected] etc]# ll

[[email protected] etc]# cp -p named.caching-nameserver.conf named.conf

[[email protected] etc]# vim named.conf

15         listen-on port 53 { any; };

27         allow-query     { any; };

36         match-clients      { any; };

37         match-destinations { any; };

[[email protected] etc]# vim named.rfc1912.zones

增加以下几行：

20 zone "bj.com" IN {

21         type master;

22 file "bj.com.db";

23 allow-update { none; };

24 };

[[email protected] etc]# cd ../var/named/

[[email protected] named]# ll

[[email protected] named]# cp -p localhost.zone bj.com.db

[[email protected] named]# vim bj.com.db

2 @               IN SOA ns.bj.com.       root (

9 @               IN NS           ns.bj.com.

10 ns              IN A            10.106.6.254

11 mail            IN A            10.106.6.254

12 pop3            IN CNAME        mail

13 smtp            IN CNAME        mail

14 @               IN MX 10        mail

Linux下mail服务器应用之邮件系统

[[email protected] named]# chkconfig named on

[[email protected] named]# service named start

Starting named: [ OK ]

③ ：客户端测试dns解析，进行简单配置：

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

④ ：进行配置，并安装接收dovecot服务器：

进行系统配置：

[[email protected] named]# vim /etc/resolv.conf

1 nameserver 10.106.6.254

[[email protected] named]# vim /etc/sysconfig/network

3 HOSTNAME=mail.bj.com

[[email protected] named]# vim /etc/hosts

127.0.0.1      mail.bj.com localhost.localdomain localh    ost

[[email protected] named]#init 6

[[email protected] ~]# yum install -y dovecot

[[email protected] ~]# chkconfig dovecot on

[[email protected] ~]# service dovecot start

Starting Dovecot Imap:                                     [ OK ] [[email protected] ~]# netstat -tupln |grep dovecot

（110,143,993（imaps）,995（pop3s））

⑤ ：bj.com客户端发送信息测试：（使用foxmail）

user1给user1发送信息：

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

user1给user2发送信息：

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

日志分析：

Mar 23 10:45:50 mail sendmail[3938]: q2N2jovd003938: from=<[email protected]>, size=1430, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=[10.106.6.190]

Mar 23 10:45:50 mail sendmail[3939]: q2N2jovd003938: to=<[email protected]>, ctladdr=<[email protected]> (501/501), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31594, dsn=2.0.0, stat=Sent

Mar 23 10:46:08 mail dovecot: pop3-login: Login: user=<user1>, method=PLAIN, rip=::ffff:10.106.6.190, lip=::ffff:10.106.6.254

Mar 23 10:46:09 mail dovecot: POP3(user1): Disconnected: Logged out top=0/0, retr=1/1696, del=0/1, size=1679

Mar 23 10:58:20 mail sendmail[4012]: q2N2wKKs004012: from=<[email protected]>, size=1481, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=[10.106.6.190]

Mar 23 10:58:20 mail sendmail[4013]: q2N2wKKs004012: to=<[email protected]>, ctladdr=<[email protected]> (501/501), delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31645, dsn=2.0.0, stat=Sent

Mar 23 10:59:09 mail dovecot: pop3-login: Aborted login: user=<[email protected]>, method=PLAIN, rip=::ffff:10.106.6.190, lip=::ffff:10.106.6.254

Mar 23 10:59:09 mail dovecot: pop3-login: Login: user=<user2>, method=PLAIN, rip=::ffff:10.106.6.190, lip=::ffff:10.106.6.254

Mar 23 10:59:09 mail dovecot: POP3(user2): Disconnected: Logged out top=0/0, retr=1/1748, del=0/2, size=3448

⑥ ：配置mail.sh.com上海服务器：

安装sendmail

[[email protected] ~]# mkdir /mnt/cdrom

[[email protected] ~]# mount /dev/cdrom /mnt/cdrom/

[[email protected] ~]# cd /mnt/cdrom/Server/

[[email protected] Server]# rpm -qa |grep -E "sendmail|m4"

[[email protected] Server]# rpm -ivh sendmail-cf-8.13.8-2.el5.i386.rpm

[[email protected] Server]# cd /etc/mail/

[[email protected] mail]# ls

编辑主要配置文件：

[[email protected] mail]# vim sendmail.mc

116 DAEMON_OPTIONS(`Port=smtp,Addr=0.0.0.0, Name=MTA')dnl

[[email protected] ~]# netstat -tupln |grep sendmail

tcp        0 0 127.0.0.1:25                0.0.0.0:*                   LISTEN      3607/sendmail: acce

[[email protected] ~]# service sendmail restart

[[email protected] ~]# netstat -tupln |grep sendmail

tcp        0 0 0.0.0.0:25                  0.0.0.0:*                   LISTEN      3528/sendmail: acce

中继文件：

[[email protected] mail]# vim access #增加10，11,12行

9 Connect:127.0.0.1 RELAY

10 Connect:10.106.6                        RELAY

11 sh.com                                  OK

12 bj.com                                  RELAY

表明邮件服务器的域名：

[[email protected] mail]# vim local-host-names

增加：sh.com

重新启动sendmail服务器：

[[email protected] mail]#chkconfig sendmail on

[[email protected] mail]# service sendmail restart

Shutting down sm-client:                                   [ OK ]

Shutting down sendmail:                                    [ OK ]

Starting sendmail:                                         [ OK ]

Starting sm-client:                                        [ OK ]

新建账户：

[[email protected] ~]# useradd user3

[[email protected] ~]# useradd user4

[[email protected] ~]# echo "123" |passwd --stdin user3

[[email protected] ~]# echo "123" |passwd --stdin user4

⑦ ：搭建mail.sh.com的dns服务器，并作相关配置：

[[email protected] ~]# cd /mnt/cdrom/Server/

[[email protected] Server]# rpm -ivh bind-9.3.4-10.P1.el5.i386.rpm

[[email protected] Server]# rpm -ivh bind-chroot-9.3.4-10.P1.el5.i386.rpm

[[email protected]]# rpm -ivh caching-nameserver-9.3.4-10.P1.el5.i386.rpm

[[email protected] Server]# cd /var/named/chroot/etc/

[[email protected] etc]# ll

[[email protected] etc]# cp -p named.caching-nameserver.conf named.conf

[[email protected] etc]# vim named.conf

15         listen-on port 53 { any; };

27   allow-query     { any; };

36         match-clients      { any; };

37         match-destinations { any; };

[[email protected] etc]# vim named.rfc1912.zones

增加以下几行：

20 zone "sh.com" IN {

21 type master;

22 file "sh.com.db";

23 allow-update { none; };

24 };

[[email protected] etc]# cd ../var/named/

[[email protected] named]# ll

[[email protected] named]# cp -p localhost.zone sh.com.db

[[email protected] named]# vim sh.com.db

2 @               IN SOA ns.sh.com.       root (

9 @               IN NS           ns.sh.com.

10 ns              IN A            10.106.6.253

11 @               IN MX 10        mail

12 mail            IN A            10.106.6.253

13 pop3            IN CNAME        mail

14 smtp            IN CNAME        mail

[[email protected] named]# chkconfig named on

[[email protected] named]# service named start

Starting named: [ OK ]

客户端测试dns解析：

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

⑧ ：在sh.com进行系统配置，并安装接收服务器：

[[email protected] named]# vim /etc/resolv.conf

1 nameserver 10.106.6.253

[[email protected] named]# vim /etc/sysconfig/network

3 HOSTNAME=mail.sh.com

[[email protected] named]# vim /etc/hosts

127.0.0.1      mail.sh.com localhost.localdomain localh    ost

[[email protected] named]#init 6

安装接受服务器：

[[email protected] ~]# yum install -y dovecot

[[email protected] ~]# chkconfig dovecot on

[[email protected] ~]# service dovecot start

Starting Dovecot Imap:                                     [ OK ] [[email protected] ~]# netstat -tupln |grep dovecot

（110,143,993（imaps）,995（pop3s））

⑨ ：sh.com的客户端测试，user3给user4发信息：

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

⑩ ：做dns转发和配置反向解析

在mail.bj.com上做dns转发和反向解析：

[[email protected] ~]# cd /var/named/chroot/etc/

[[email protected] etc]# vim named.conf

28         forwarders      { 10.106.6.253; };

[[email protected] etc]# rndc reload

server reload successful

[[email protected] etc]# vim named.rfc1912.zones

55 zone "6.106.10.in-addr.arpa" IN {

56 type master;

57 file "10.106.6.db";

58 allow-update { none; };

59 };

[[email protected] etc]# cd ../var/named/

[[email protected] named]# ll

[[email protected] named]# cp -p named.local 10.106.6.db

[[email protected] named]# vim 10.106.6.db

254     IN PTR     mail.bj.com.

153     IN PTR     mail.sh.com.

[[email protected] named]# rndc reload

server reload successful

在mail.sh.com上做dns转发和反向解析：

[[email protected] ~]# cd /var/named/chroot/etc/

[[email protected] etc]# vim named.conf

28         forwarders      { 10.106.6.254; };

[[email protected] etc]# rndc reload

server reload successful

[[email protected] etc]# vim named.rfc1912.zones

55 zone "6.106.10.in-addr.arpa" IN {

56 type master;

57 file "10.106.6.db";

58 allow-update { none; };

59 };

[[email protected] etc]# cd ../var/named/

[[email protected] named]# ll

[[email protected] named]# cp -p named.local 10.106.6.db

[[email protected] named]# vim 10.106.6.db

254     IN PTR     mail.bj.com.

153     IN      PTR mail.sh.com.

[[email protected] named]# rndc reload

server reload successful

? :测试通信情况

（bj.com的客户[email protected]与sh.com的客户[email protected]通信）

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

Linux下mail服务器应用之邮件系统

? ：监控的日志信息：

mail.bj.com的日志信息：

[[email protected] ~]# tail -f /var/log/maillog

Mar 23 15:46:07 mail dovecot: pop3-login: Aborted login: user=<[email protected]>, method=PLAIN, rip=::ffff:10.106.6.190, lip=::ffff:10.106.6.254

Mar 23 15:46:07 mail dovecot: pop3-login: Login: user=<user2>, method=PLAIN, rip=::ffff:10.106.6.190, lip=::ffff:10.106.6.254

Mar 23 15:46:07 mail dovecot: POP3(user2): Disconnected: Logged out top=0/0, retr=0/0, del=0/3, size=5025

Mar 23 15:46:13 mail sendmail[2298]: q2N7kCbh002298: from=<[email protected]>, size=1458, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=[10.106.6.190]

Mar 23 15:46:16 mail sendmail[2300]: q2N7kCbh002298: to=<[email protected]>, ctladdr=<[email protected]> (500/500), delay=00:00:03, xdelay=00:00:03, mailer=esmtp, pri=121458, relay=mail.sh.com. [10.106.6.253], dsn=2.0.0, stat=Sent (q2N8W6jM003583 Message accepted for delivery)

Mar 23 15:48:38 mail sendmail[2307]: q2N7mc6a002307: from=<[email protected]>, size=3353, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=[10.106.6.253]

Mar 23 15:48:38 mail sendmail[2308]: q2N7mc6a002307: to=<[email protected]>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=33514, dsn=2.0.0, stat=Sent

Mar 23 15:48:54 mail dovecot: pop3-login: Aborted login: user=<[email protected]>, method=PLAIN, rip=::ffff:10.106.6.190, lip=::ffff:10.106.6.254

Mar 23 15:48:54 mail dovecot: pop3-login: Login: user=<user1>, method=PLAIN, rip=::ffff:10.106.6.190, lip=::ffff:10.106.6.254

Mar 23 15:48:54 mail dovecot: POP3(user1): Disconnected: Logged out top=0/0, retr=1/3623, del=0/1, size=3606

Mar 23 15:51:04 mail sendmail[2320]: q2N7p4Pg002320: from=<[email protected]>, size=1470, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=[10.106.6.190]

Mar 23 15:51:04 mail sendmail[2322]: q2N7p4Pg002320: to=<[email protected]>, ctladdr=<[email protected]> (500/500), delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=121470, relay=mail.sh.com. [10.106.6.253], dsn=2.0.0, stat=Sent (q2N8aucK003603 Message accepted for delivery)

Mar 23 15:52:25 mail sendmail[2325]: q2N7qPlW002325: from=<[email protected]>, size=3514, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=[10.106.6.253]

Mar 23 15:52:25 mail sendmail[2326]: q2N7qPlW002325: to=<[email protected]>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=33675, dsn=2.0.0, stat=Sent

Mar 23 15:52:34 mail dovecot: pop3-login: Aborted login: user=<[email protected]>, method=PLAIN, rip=::ffff:10.106.6.190, lip=::ffff:10.106.6.254

Mar 23 15:52:34 mail dovecot: pop3-login: Login: user=<user1>, method=PLAIN, rip=::ffff:10.106.6.190, lip=::ffff:10.106.6.254

Mar 23 15:52:34 mail dovecot: POP3(user1): Disconnected: Logged out top=0/0, retr=1/3786, del=0/2, size=7375

mail.sh.com的日志信息：

[[email protected] ~]# tail -f /var/log/maillog

Mar 23 16:24:06 mail dovecot: pop3-login: Login: user=<user3>, method=PLAIN, rip=::ffff:10.106.6.200, lip=::ffff:10.106.6.253

Mar 23 16:24:06 mail dovecot: POP3(user3): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0

Mar 23 16:24:07 mail dovecot: pop3-login: Login: user=<user4>, method=PLAIN, rip=::ffff:10.106.6.200, lip=::ffff:10.106.6.253

Mar 23 16:24:07 mail dovecot: POP3(user4): Disconnected: Logged out top=0/0, retr=0/0, del=0/0, size=0

Mar 23 16:32:07 mail sendmail[3583]: q2N8W6jM003583: from=<[email protected]>, size=1617, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=mail.bj.com [10.106.6.254]

Mar 23 16:32:08 mail sendmail[3584]: q2N8W6jM003583: to=<[email protected]>, delay=00:00:01, xdelay=00:00:01, mailer=local, pri=31791, dsn=2.0.0, stat=Sent

Mar 23 16:32:51 mail dovecot: pop3-login: Login: user=<user3>, method=PLAIN, rip=::ffff:10.106.6.200, lip=::ffff:10.106.6.253

Mar 23 16:32:51 mail dovecot: POP3(user3): Disconnected: Logged out top=0/0, retr=1/1898, del=1/1, size=1881

Mar 23 16:34:29 mail sendmail[3595]: q2N8YTvQ003595: from=<[email protected]>, size=3193, class=0, nrcpts=1, msgid=<[email protected]>, proto=SMTP, daemon=MTA, relay=[10.106.6.200]

Mar 23 16:34:29 mail sendmail[3597]: q2N8YTvQ003595: to=<[email protected]>, ctladdr=<[email protected]> (500/500), delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=123193, relay=mail.bj.com. [10.106.6.254], dsn=2.0.0, stat=Sent (q2N7mc6a002307 Message accepted for delivery)

Mar 23 16:36:56 mail sendmail[3603]: q2N8aucK003603: from=<[email protected]>, size=1629, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=mail.bj.com [10.106.6.254]

Mar 23 16:36:56 mail sendmail[3604]: q2N8aucK003603: to=<[email protected]>, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31803, dsn=2.0.0, stat=Sent

Mar 23 16:37:04 mail dovecot: pop3-login: Login: user=<user3>, method=PLAIN, rip=::ffff:10.106.6.200, lip=::ffff:10.106.6.253

Mar 23 16:37:04 mail dovecot: POP3(user3): Disconnected: Logged out top=0/0, retr=1/1909, del=1/1, size=1892

Mar 23 16:38:16 mail sendmail[3611]: q2N8cGVM003611: from=<[email protected]>, size=3354, class=0, nrcpts=1, msgid=<[email protected]>, proto=SMTP, daemon=MTA, relay=[10.106.6.200]

Mar 23 16:38:16 mail sendmail[3613]: q2N8cGVM003611: to=<[email protected]>, ctladdr=<[email protected]> (500/500), delay=00:00:00, xdelay=00:00:00, mailer=esmtp, pri=123354, relay=mail.bj.com. [10.106.6.254], dsn=2.0.0, stat=Sent (q2N7qPlW002325 Message accepted for delivery)