maildrop [复制链接]

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发表于 2006-06-30 15:54 |只看该作者 |倒序浏览

Postfix Integrated Solution

集成电子邮件系统(MYSQL)
[url=http://www.huihoo.com/internet/postfix/pis/x842.html]Next >>>
Installing Courier Maildrop
                                       Maildir format                         Web-mail email client
                                          mailboxes
      /-----------\    /----------\    ***********       /---------\    /----------\
      |          |    |       |    *  Inbox  *       |       |    |       |
      |          | ====> | Maildrop | ===> *       *  | Courier |    | Postman  |
| MTA    |    \----------/  |                      |       | IMAP  | Apache |       |       |
SMTP  |          |          |       |====> ************    |       |  |       |  | User's  |
to &  | (Message  |       filtering |    * YYY *    |       |    |       |  HTTP | web    |
from  |  Transfer |       rules in    \=>************ *  |       |    |       |  or    | browser |
other |  Agent) |       .mailfilter    * XXX * ***    |       | IMAP  |  SMTP |  HTTPS  |       |
MTAs  |          |  |       |  |                      |
                                                               \                      |  IMAP capable Email |
                                                               \                      |  client             |
                                                                  \                      |                      |
                                                                  \-----------
作者:love100 出处:chinunix.net Mail版

maildrop是一个替代邮件代理并且包含邮件过滤的语言，系统管理员用
这个maildrop即可以取代已经存在的邮件投递代理，或者用户可以用已
经存在的邮件投递代理的'forward to
program'机制来取代来运行maildrop.
maildrop首先从标准输入读取E-mail信息,其后面所带的回车符号将自动
被删除，一个E-mail信息包含header lines 后面跟着一个空行，然后跟
着信息的内容，信息的内容也可能在第一个header lines
之前包含mbox-style From_ line,如果信息内容没有包含From_line,那
么maildrop将自动创建一个.
如果文件/etc/maildroprc存在，邮件投递或邮件过滤将从/etc/maildro
prc中读出。maildrop的投递/过滤指令可能把信息保存在一个特殊的mai
lbox,或者丢弃它，或者返回给发送者，或者转发到不同的邮件地址。
如果文件/etc/maildroprc不存在，或者邮件投递或邮件过滤没有完全的
处理信息，这时maildrop将从$HOME/.mailfilter读取规则，如果.mailf
ilter不存在，或者邮件投递或邮件过滤没有完全的处理信息,maildrop
将保存E-mail信息到默认的mailbox里。
maildrop知道怎样投递到一个标准的mailbox文件，也知道怎样投递到一
个maildirs,maildir格式的目录在Courier和qmail中使用，还有一些邮
件服务器也知道如何去读maildirs。当投递mailbox文件时，maildrop将
锁定mailbox,直到投递结束。
maildrop读取信息的规则为：在From_header之前致少一空行，maildrop
在读取规则时将忽略此空行,因此maildrop要求规则中至少有一个空行。
通常邮件投递模式分为三种（maildrop依赖投递模式的不同也有小小的
差异）：
1.手动模式.
一个文件包含过滤指令例：maildrop -filename(保存过滤指信令的文
件),首先maildrop读取/etc/maildroprc文件里面的指令，然后从filena
me读取过滤指令.如果filename里面没有转发，回复，删除或到一个特殊
的maildox,那么它将投递到系统用户的mailbox中.
2投递模式.
maildrop如果没有指定 -filename时，maildrop将在投递模式运行，maildrop将改变当前目录到用户的的主目录，这时读取/etc/maildroprc,再读取 $HOME/.mailfilter
3 嵌入模式
主要用于Courier上，在此不做阐述.
安全
maildrop在setuid位下安装是安全的。Courier为了让maildrop在嵌入模式下使用因此它的setuid位是默认的。如果root运行maildrop 则-d这个选项会被用来指定这个信息的接受者，maildrop立马会重制用户的ID,读取$HOME/.mailfilter文件，并将信息投递到指定的用户。
系统管理员能通过配置来限制maildrop -d 这个选项是否给每个用户来使用（邮件系统用户本伸除外）
maildrop的（简单）用法：
-A "Header:value"
增加一个附加的头部信息。
-d user
在投递模式设置用户的ID
-f address
设置变量"FROM"为一个地址
-m
在嵌入模式下运行
-M filterfile
在一个特殊的嵌入模式运行
cc dotlock flock log logfile to xfilter
都不能运行在嵌入模式下
（待续）

安装
[root@linuxas3 maildrop-1.6.3]# ./configure --prefix=/usr/local/courier \
--enable-sendmail=/usr/sbin/sendmail \
--enable-maildropmysql --with-mysqlconfig=/etc/postfix/mysql_maildrop.conf \
--enable-maildirquota --with-trashquota --with-dirsync \
--enable-trusted-users='root maildrop' \
--enable-maildrop-uid=1000 \
--enable-maildrop-gid=1000
[root@linuxas3 maildrop-1.6.3]# make
[root@linuxas3 maildrop-1.6.3]# make install (as root)

配置 mysql_maildrop.conf
[root@linuxas3 maildrop-1.6.3]# cp maildropmysql.config /etc/postfix/mysql_maildrop.conf
[root@linuxas3 maildrop-1.6.3]# cd /etc/postfix/
[root@linuxas3 postfix]# vi mysql_maildrop.conf
hostname localhost
port 3306
socket /var/lib/mysql/mysql.sock
database postfix
dbuser postfix
dbpw xxxxx
dbtable postfix_users
default_uidnumber 1000
default_gidnumner 1000
uid_field user
uidnumber_field uid
gidnumber_field gid
maildir_field maildir
homedirectory_field home
quota_field quota
mailstatus_field status
where_clause ""

Example 1. mysql_maildrop.conf
[root@linuxas3 postfix]# cat mysql_maildrop.conf
# The attributes are:
#
# mail - The full email address of the user (ie user@yourdomain.com)
#       This is the primary attribute searched upon by maildrop.
#
# maildir - The location (full path including name) of the users
#          mail directory (Maildir)
#
# homedirectory - The location (full path including name) of the
#                users home directory.  This may be the same as the
#                users maildir.
#
# uidnumber - The uid of the user that owns the mail files for
#          this user.  This may be a specific uid per user,
#          or a single uid for every user (full 'virtual' user
#          configuration), or a combination.
#
# gidnumber - The gid of the user that owns the mail files for
#          this user.  This may be a specific gid per user,
#          or a single gid for every user (full 'virtual' user
#          configuration), or a combination.
#
# quota    - *OPTIONAL* The quota for this user.  If blank, or
#          non-existent defaults to no quota.
# mailstatus - account status
#
# A sample LDAP entry is given at the end of this file.
#
# --- Actual configuration begins here -----------------------------
# hostname - host name of your ldap server
hostname       localhost
port          3306
socket       /var/lib/mysql/mysql.sock
database       postfix
dbuser       postfix
dbpw          6AJx9Nqv9x8hg
dbtable       postfix_users
#not used now
#timeout             5
# default_uid - default uid (number only) to use incase uidnumber attribute not
# found in users mysql entry
default_uidnumber    1000
# default_gid - default gid (number only) to use incase gidnumber attribute not
# found in users ldap entry
default_gidnumber    1000
# MySQL Field definitions
#
# This section allows you to specify the actual attributes you
# use in your Mysql record
#
# The example attribute mapping shown below is also the default
# mapping used by maildrop in the case that any are missing
# UID_FIELD - MySQL attribute which contains the users name (w or w/o domain)
uid_field             user
# UIDNUMBER_FIELD - MySQL attribute which contains the system uid to deliver
# mail as
uidnumber_field       uid
# GIDNUMBER_FIELD - MySQL attribute which contains the system gid to deliver
# mail as
gidnumber_field       gid
# MAILDIR_FIELD - MySQL attribute which contains the path to the users
# custom maildir
maildir_field          maildir
# HOMEDIRECTORY_FIELD - MySQL attribute which contains the path to the users
# home directory
homedirectory_field    home
# QUOTA_FIELD - MySQL attribute which contains the users quota
quota_field          quota
# MYSQL_DEFAULT_STATUS_FIELD - MySQL attribute which could be created in the
# MySQL entry to set whether or not the user is allowed to receive email on
# this box..
#             -- looks unused for now; but must be valid column ! (2001-11-03)
mailstatus_field       status
# MYSQL_DEFAULT_WHERE_CLAUSE - This is optional !
# It can be set to any fixed string starting with keyword 'AND'.
# It will then be appended to the WHERE clause of our query.
where_clause          ""
[root@linuxas3 postfix]#

配置 master.cf
[root@linuxas3 postfix]# vi master.cf
maildrop  unix  -    n    n    -    -    pipe
  flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}

改为
maildrop  unix  -    n    n    -    -    pipe
  flags=DRhu user=postfix argv=/usr/local/courier/bin/maildrop -d ${recipient}

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本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/19772/showart_134798.html

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