转移邮件服务器：postfix

原邮件服务器硬盘损害，已经无法工作，需要转移到新服务器上。
原来的服务器是debian etch，新服务器是ubuntu feisty。

首先安装：
sudo aptitude install postfix postfix-mysql courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl postfix-tls libsasl2 libsasl2-modules libsasl2-modules-sql sasl2-bin openssl libpam-mysql amavisd-new spamassassin clamav clamav-daemon zoo unzip bzip2 unzoo libnet-ph-perl libnet-snpp-perl libnet-telnet-perl nomarch lzop pax razor pyzor dcc-client

首先创建mysql数据库，因为原来已经创建，直接导入就可以了。
把原来的mysql-virtual*文件拷贝到/etc/postfix/目录下，注意若mysql用户密码发生变化，要进行相应的修改。
然后修改文件权限：

chmod o= /etc/postfix/mysql-virtual_*.cf
chgrp postfix /etc/postfix/mysql-virtual_*.cf

创建vmail用户：

groupadd -g 5000 vmail
useradd -g vmail -u 5000 vmail -d /home/vmail -m

对/etc/postfix/main.cf进行修改定制：

postconf -e ‘myhostname = server1.example.com’
postconf -e ‘mydestination = server1.example.com, localhost, localhost.localdomain’
postconf -e ‘mynetworks = 127.0.0.0/8′
postconf -e ‘virtual_alias_domains =’
postconf -e ‘ virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf’
postconf -e ‘virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf’
postconf -e ‘virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf’
postconf -e ‘virtual_mailbox_base = /home/vmail’
postconf -e ‘virtual_uid_maps = static:5000′
postconf -e ‘virtual_gid_maps = static:5000′
postconf -e ‘smtpd_sasl_auth_enable = yes’
postconf -e ‘broken_sasl_auth_clients = yes’
postconf -e ‘smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination’
postconf -e ‘transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf’
postconf -e ‘content_filter = amavis:[127.0.0.1]:10024′
postconf -e ‘receive_override_options = no_address_mappings’

这部分需要具体检查，我把myorigin这个给注释掉了，对于多域名的邮件列表有影响。

saslauthd相关设置，和DEBIAN不大一样，和UBUNTU EDGY也不尽相同：

sudo rm -fdr /var/spool/postfix/var/run/saslauthd
sudo mv /var/run/saslauthd /var/spool/postfix/var/run/saslauthd
sudo ln -s /var/spool/postfix/var/run/saslauthd /var/run/saslauthd
sudo adduser postfix sasl

修改/etc/default/saslauthd文件，把START修改为yes。
修改/etc/pam.d/smtp文件：

auth required pam_mysql.so user=mail_admin passwd=mail_admin_password host=127.0.0.1 db=mail table=users usercolumn=email passwdcolumn=password crypt=1

account sufficient pam_mysql.so user=mail_admin passwd=mail_admin_password host=127.0.0.1 db=mail table=users usercolumn=email passwdcolumn=password crypt=1

对应的用户名密码数据库要进行替换。

修改/etc/courier/authdaemonrc文件，把authmodulelist的值变为”authmysql”。

修改/etc/init.d/postfix文件，在FILES部分：

FILES=”etc/localtime etc/services etc/resolv.conf etc/hosts \
etc/nsswitch.conf etc/nss_mdns.config etc/postfix/sasl/smtpd.conf etc/sasldb2″

这个原来是有sasldb2文件的，但是在ubuntu feisty下没有这个文件，但执行起来没有问题，比较奇怪。

修改/etc/courier/authmysqlrc文件：

MYSQL_SERVER localhost

MYSQL_USERNAME mail_admin

MYSQL_PASSWORD mail_admin_password

MYSQL_PORT 0

MYSQL_DATABASE mail

MYSQL_USER_TABLE users

MYSQL_CRYPT_PWFIELD password

#MYSQL_CLEAR_PWFIELD password

MYSQL_UID_FIELD 5000

MYSQL_GID_FIELD 5000

MYSQL_LOGIN_FIELD email

MYSQL_HOME_FIELD “/home/vmail”

MYSQL_MAILDIR_FIELD CONCAT(SUBSTRING_INDEX(email,’@',-1),’/',SUBSTRING_INDEX(email,’@',1),’/')

重新启动服务：

/etc/init.d/courier-authdaemon restart
/etc/init.d/courier-imap restart
/etc/init.d/courier-imap-ssl restart
/etc/init.d/courier-pop restart
/etc/init.d/courier-pop-ssl restart
/etc/init.d/postfix restart
/etc/init.d/saslauthd restart

修改/etc/aliases文件，可以根据自己的需要进行修改。

修改vi /etc/amavis/conf.d/15-content_filter_mode文件，去掉几个注释：

use strict;

# You can modify this file to re-enable SPAM checking through spamassassin

# and to re-enable antivirus checking.

#

# Default antivirus checking mode

# Uncomment the two lines below to enable it back

#

@bypass_virus_checks_maps = (

\%bypass_virus_checks, \@bypass_virus_checks_acl, \$bypass_virus_checks_re);

#

# Default SPAM checking mode

# Uncomment the two lines below to enable it back

#

@bypass_spam_checks_maps = (

\%bypass_spam_checks, \@bypass_spam_checks_acl, \$bypass_spam_checks_re);

1; # insure a defined return

修改 /etc/amavis/conf.d/50-user文件，添加：

$pax=’pax’;

修改/etc/postfix/master.cf文件，添加：

[...]

amavis unix – - – - 2 smtp

-o smtp_data_done_timeout=1200

-o smtp_send_xforward_command=yes

127.0.0.1:10025 inet n – - – - smtpd

-o content_filter=

-o local_recipient_maps=

-o relay_recipient_maps=

-o smtpd_restriction_classes=

-o smtpd_client_restrictions=

-o smtpd_helo_restrictions=

-o smtpd_sender_restrictions=

-o smtpd_recipient_restrictions=permit_mynetworks,reject

-o mynetworks=127.0.0.0/8

-o strict_rfc821_envelopes=yes

-o receive_override_options=no_unknown_recipient_checks,no_header_body_checks

-o smtpd_bind_address=127.0.0.1

修改/etc/spamassassin/local.cf，添加：

[...]

# dcc

use_dcc 1

dcc_path /usr/bin/dccproc

dcc_add_header 1

dcc_dccifd_path /usr/sbin/dccifd

#pyzor

use_pyzor 1

pyzor_path /usr/bin/pyzor

pyzor_add_header 1

#razor

use_razor2 1

razor_config /etc/razor/razor-agent.conf

#bayes

use_bayes 1

use_bayes_rules 1

bayes_auto_learn 1

启动服务：

adduser clamav amavis
/etc/init.d/amavis restart
/etc/init.d/clamav-daemon restart
/etc/init.d/clamav-freshclam restart
/etc/init.d/postfix restart

参考：

http://www.howtoforge.com/virtual_postfix_mysql_quota_courier_ubuntu_edgy

http://wlx.westgis.ac.cn/322/