linux gateway
ifconfig eth0 192.168.5.50 netmask 255.255.255.0
route add default gw 192.168.5.11

To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system

PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:
/usr/bin/mysqladmin -u root password 'new-password'
/usr/bin/mysqladmin -u root -h localhost.localdomain password 'new-password'

Alternatively you can run:
/usr/bin/mysql_secure_installation

which will also give you the option of removing the test
databases and anonymous user created by default.  This is
strongly recommended for production servers.

See the manual for more instructions.

You can start the MySQL daemon with:
cd /usr ; /usr/bin/mysqld_safe &

You can test the MySQL daemon with mysql-test-run.pl
cd mysql-test ; perl mysql-test-run.pl

Please report any problems with the /usr/bin/mysqlbug script!

The latest information about MySQL is available on the web at
http://www.mysql.com
Support MySQL by buying support/licenses at http://shop.mysql.com
                                                           [  OK  ]
Starting MySQL:                                            [  OK  ]
You have mail in /var/spool/mail/root

LUSH PRIVILEGES;

INSERT INTO mysql.user ( HOST, USER, PASSWORD, select_priv, insert_priv,               update_priv,

delete_priv,  create_priv, drop_priv, reload_priv, shutdown_priv,               process_priv,  file_priv,

grant_priv, references_priv, index_priv, alter_priv, show_db_priv, super_priv, create_tmp_table_priv,

lock_tables_priv,                   execute_priv, repl_slave_priv, repl_client_priv, create_view_priv,

show_view_priv, create_routine_priv, alter_routine_priv, create_user_priv ) VALUES ( '%', 'b',

PASSWORD('b'), 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y', 'Y',

'Y', 'Y', 'Y', 'Y', 'Y' );
/*[23:06:31][   0 ms]*/ FLUSH PRIVILEGES;

 

/
1.使用mysqladmin修改mysql密码
C:\>mysqladmin -udbuser -p password newpass
Enter password: oldpass
当然用此命令的前提是你把mysql加入了环境变量，如果没有加入环境变量的话那只能在命令行下cd到

mysqladmin所在的目录下与此那个次命令了！
-----------------------------------------
2.重置root密码
方法一:
在my.ini的[mysqld]字段加入：
skip-grant-tables
重启mysql服务，这时的mysql不需要密码即可登录数据库
然后进入mysql
mysql>use mysql;
mysql>update user set password=password('新密码') WHERE User='root';
mysql>flush privileges;
运行之后最后去掉my.ini中的skip-grant-tables，重启mysqld即可。
修改mysql密码方法二:
不使用修改my.ini重启服务的方法，通过非服务方式加skip-grant-tables运行mysql来修改mysql密码
停止mysql服务
打开命令行窗口，在bin目录下使用mysqld-nt.exe启动，即在命令行窗口执行: mysqld-nt --skip-grant-

tables
然后另外打开一个命令行窗口，登录mysql，此时无需输入mysql密码即可进入。
按以上方法修改好密码后,关闭命令行运行mysql的那个窗口，此时即关闭了mysql，如果发现mysql仍在运行

的话可以结束掉对应进程来关闭。
启动mysql服务

-----------------------------------------

记住此方法，走遍天下无mysql密码

///

mysql> Update user SET password=PASSWORD("new password") Where user=’name’;

mysql> FLUSH PRIVILEGES;

mysql> QUIT

使用--skip-grant-tables参数启动MySQL Server

shell>mysqld_safe --skip-grant-tables &

4.为root@localhost设置新密码

shell>mysqladmin -u root flush-privileges password "newpassword"

//
安装dovecot-1.0.7-7.el5.i386服务的时候出现

libpq.so.4 is needed by dovecot-1.0.7-7.el5.i386

解决方法：
http://hi.baidu.com/why8498/blog/item/756106376f4543d7a2cc2b3a.html
在使用m4处理sendmail.mc的时候，为什么会出现错误"m4: Cannot open /usr/share/sendmail-

cf/m4/cf.m4: No such file or directory"?

这个错误表示sendmail-cf这个软件包没有安装，可以使用up2date或者从Red Hat Network(RHN)中下载安

装sendmail-cf软件包；如果系统已经注册到RHN上可以使用up2date安装软件包，以root用户执行下面命令

：

 

error: Failed dependencies:
        libmysqlclient.so.15 is needed by dovecot-1.0.7-7.el5.i386
        libmysqlclient.so.15(libmysqlclient_15) is needed by dovecot-1.0.7-7.el5.i386
        libpq.so.4 is needed by dovecot-1.0.7-7.el5.i386

安装以下rpm包就OK了！
rpm -ivh perl-DBI-1.52-2.el5.i386.rpm
rpm -ivh mysql-5.0.45-7.el5.i386.rpm
rpm -ivh postgresql-libs-8.1.11-1.el5_1.1.i386.rpm
rpm -ivh dovecot-1.0.7-7.el5.i386.rpm
 
、、、、、、、、、、、、、、、、、、、、、、、、、、

 

查看安装
rpm -qa | grep sendmail
rpm -qa | grep dovecot
rpm -qa | grep cyrus
安装邮件服务器
yum install sendmail sendmail-cf
安装pop3/imap服务
yum install dovecot

安装用户认证
yum install cyrus-sasl
yum install cyrus-sasl-md5
yum install cyrus-sasl-plain
yum install cyrus-sasl-lib

修改sendmail配置
vi /etc/mail/sendmail.mc

第42行和43行，把最前面的dnl删除，变成:
TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS',`EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

修改SMTP的监听IP为 0.0.0.0
DAEMON_OPTIONS(`Port=smtp,Addr=0.0.0.0, Name=MTA')dnl

生成配置
m4 /etc/mail/sendmail.mc > /etc/sendmail.cf
***************************
如果出现：sendmail.mc:10: m4: cannot open `/usr/share/sendmail-cf/m4/cf.m4': No such file or

directory
说明需要安装sendmail-cf
yum install sendmail-cf
***************************

修改dovecot配置
vi /etc/dovecot.conf
去掉下面一行前面的#
#protocols =imap imaps pop3 pop3s

添加域名
vi /etc/mail/local-host-names
添加域名如:dirtysea.com //每个域名一行

修改认证方式
vi /usr/lib/sasl2/Sendmail.conf 里面指明了：pwcheck_method=saslauthd，不做修改
vi /etc/sysconfig/saslauthd 找到第7行的：MECH= 改成：MECH=shadow
保存
如下示列：

[root@mail]# cat /usr/lib/sasl2/Sendmail.conf
pwcheck_method:saslauthd
[root@mail]# cat /usr/lib/sasl2/smtpd.conf.rpmsave
log_level: 3
pwcheck_method: saslauthd
mech_list: PLAIN LOGIN
[root@mail]# cat /etc/sysconfig/saslauthd
# Directory in which to place saslauthd's listening socket, pid file, and so
# on. This directory must already exist.
SOCKETDIR=/var/run/saslauthd
# Mechanism to use when checking passwords. Run "saslauthd -v" to get a list
# of which mechanism your installation was compiled with the ablity to use.
MECH=shadow
# Additional flags to pass to saslauthd on the command line. See saslauthd(8)
# for the list of accepted flags.
FLAGS=
[root@mail]#testsaslauthd -u test -p 123456 (验证smtp)
0: OK "Success."

 

 

添加邮件用户
[root@localhost named]# groupadd mailuser
[root@localhost named]# adduser -g mailuser -s /sbin/nologin test
这样添加的用户名就没有了shell,只能收发信而不能登录到服务器运行其他程序

设置开机启动
chkconfig sendmail on
chkconfig dovecot on
chkconfig saslauthd on

重启
service sendmail restart
service dovecot restart
service saslauthd restart

验证Sendmail服务
telnet localhost 25 //输入helo localhost 此时应该有LOGIN PLAIN的字样，即表示SMTP认证设置成功。

[root@centos5 mail]# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
220 centos5 ESMTP Sendmail 8.13.8/8.13.8; Thu, 6 May 2010 06:21:29 +0800
helo localhost
250 centos5 Hello localhost.localdomain [127.0.0.1], pleased to meet you
mail from:
250 2.1.0 ... Sender ok
rcpt to: (要测试向外发送邮件就填写网络上存在的邮件地址)
250 2.1.5 ... Recipient ok
data
354 Enter mail, end with "." on a line by itself
From: alin
To: alin
Subject: Hello
test
.
250 2.0.0 o45MLTcH005157 Message accepted for delivery
quit
221 2.0.0 centos5 closing connection
Connection closed by foreign host.

 

ok，可以使用outlook或foxmail进行测试收发了。

注意：为什么没有设定foxmail中的smtp服务器需要验证，也可以发送E-mail?
要用OUTLOOK来测试，Foxmail似乎可以自动地进行smtp认证。OUTLOOK在smtp服务器验证失败后，有

拒绝提示

工具->;帐户->;邮件->;属性->;服务器->;我的服务器要求身份验证(选上)->;设置->;(选择)登录方式->;帐户

名:(用saslpasswd2建立的),密码(用saslpasswd2建立的)->;确定.
另外：接收邮件服务器的帐户名与密码应该是系统里的用户名与密码.

saslauthd -v 看结果支不支持 pam或shadow
smtp验证测试： testsaslauthd -u test -p 123456
sasldblistusers2 检查已经增加的smtp验证用户
saslpasswd2增加smtp验证用户：saslpasswd2 -u cencn.com -c test

查看sendmail队列：mailq
立即发送队列里的邮件： sendmail –oQ/var/spool/mqueue.stop -q
察看邮件系统的状态：mailstats
查看暂时存储邮件：ls -l /var/spool/mail |more

 

、、、、、、、、、、、、、、、、、、
问题
testsaslauthd connect() : No such file or directory
解决
加上：-f /var/state/saslauthd/mux，用下边的命令即可
testsaslauthd -s smtpd -u root -p 1111111 -f /var/state/saslauthd/mux
、、、、、、、、、、、、、、、、、、、

问题
connect() : Connection refused（连接被拒绝）
解决

······························································

makemap hash access < access       

RoundCube Webmail登录不了！！急
http://www.extmail.org/forum/viewthread.php?tid=8425
进入登录界面后，总是login failed.查看dovecot.log如下：
dovecot: Jul 25 09:48:17 Error: auth-worker(default): sql(vmail,127.0.0.1): Password query failed: Not

connected to database
dovecot: Jul 25 09:48:19 Info: imap-login: Disconnected (auth failed, 1 attempts): user=<vmail>,

method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured
查看邮件日志如下：
IMAP Error: Authentication for admin@oa.geniusinform.com failed (LOGIN): "a001 NO Temporary

authentication failure." in  on line 0
大虾们帮帮我，谢谢谢谢谢....急！！！
我也碰到这个问题.
找了两天才发现问题出在dovecot.conf,修改以下字段就行了
auth_username_format = %n