Sealyu

前期工作:

在DNS管理中加入:

MX:mail.lapkeung.com(優先級 10)

mail.lapkeung.com

一.sendmail服務器的安裝:

1.首先查看sendmail是否安裝完畢

[root@localhost mail]#rpm -q sendmail

sendmail-8.13.1-2

如果發現沒有安裝的話,在添加刪除軟件包里,把郵件這個選上,然后安裝

2.安裝redhat linuxAS 4 后,修改 /etc/mail/sendmail.mc.

divert(-1)dnl
dnl #
dnl # This is the sendmail macro config file for m4. If you make changes to
dnl # /etc/mail/sendmail.mc, you will need to regenerate the
dnl # /etc/mail/sendmail.cf file by confirming that the sendmail-cf package is
dnl # installed and then performing a
dnl #
dnl #      make -C /etc/mail
dnl #
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for Red Hat Linux')dnl
OSTYPE(`linux')dnl
dnl #
dnl # Uncomment and edit the following line if your outgoing mail needs to
dnl # be sent out through an external mail server:
dnl #
dnl define(`SMART_HOST',`smtp.your.provider')
dnl #
define(`confDEF_USER_ID',``8:12'')dnl
define(`confTRUSTED_USER', `smmsp')dnl
dnl define(`confAUTO_REBUILD')dnl
define(`confTO_CONNECT', `1m')dnl
define(`confTRY_NULL_MX_LIST',true)dnl
define(`confDONT_PROBE_INTERFACES',true)dnl
define(`PROCMAIL_MAILER_PATH',`/usr/bin/procmail')dnl
define(`ALIAS_FILE', `/etc/aliases')dnl
dnl define(`STATUS_FILE', `/etc/mail/statistics')dnl
define(`UUCP_MAILER_MAX', `2000000')dnl
define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl
define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl
define(`confAUTH_OPTIONS', `A')dnl
dnl #
dnl # The following allows relaying if the user authenticates, and disallows
dnl # plaintext authentication (PLAIN/LOGIN) on non-TLS links
dnl #
dnl define(`confAUTH_OPTIONS', `A p')dnl
dnl #
dnl # PLAIN is the preferred plaintext authentication method and used by
dnl # Mozilla Mail and Evolution, though Outlook Express and other MUAs do
dnl # use LOGIN. Other mechanisms should be used if the connection is not
dnl # guaranteed secure.
dnl #
define(QUEUE_DIR, `/var/spool/mqueue/q*')
TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
dnl #
dnl # Rudimentary information on creating certificates for sendmail TLS:
dnl #      make -C /usr/share/ssl/certs usage
dnl #
dnl define(`confCACERT_PATH',`/usr/share/ssl/certs')
dnl define(`confCACERT',`/usr/share/ssl/certs/ca-bundle.crt')
dnl define(`confSERVER_CERT',`/usr/share/ssl/certs/sendmail.pem')
dnl define(`confSERVER_KEY',`/usr/share/ssl/certs/sendmail.pem')
dnl #
dnl # This allows sendmail to use a keyfile that is shared with OpenLDAP's
dnl # slapd, which requires the file to be readble by group ldap
dnl #
dnl define(`confDONT_BLAME_SENDMAIL',`groupreadablekeyfile')dnl
dnl #
dnl define(`confTO_QUEUEWARN', `4h')dnl
dnl define(`confTO_QUEUERETURN', `5d')dnl
dnl define(`confQUEUE_LA', `12')dnl
dnl define(`confREFUSE_LA', `18')dnl
define(`confTO_IDENT', `0')dnl
dnl FEATURE(delay_checks)dnl
FEATURE(`no_default_msa',`dnl')dnl
FEATURE(`smrsh',`/usr/sbin/smrsh')dnl
FEATURE(`mailertable',`hash -o /etc/mail/mailertable.db')dnl
FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable.db')dnl
FEATURE(redirect)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
dnl #
dnl # The -t option will retry delivery if e.g. the user runs over his quota.
dnl #
FEATURE(local_procmail,`',`procmail -t -Y -a $h -d $u')dnl
FEATURE(`access_db',`hash -T<TMPF>; -o /etc/mail/access.db')dnl
FEATURE(`blacklist_recipients')dnl
EXPOSED_USER(`root')dnl
dnl #
dnl # The following causes sendmail to only listen on the IPv4 loopback address
dnl # 127.0.0.1 and not on any other network devices. Remove the loopback
dnl # address restriction to accept email from the internet or intranet.
dnl #
dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
dnl #
dnl # The following causes sendmail to additionally listen to port 587 for
dnl # mail from MUAs that authenticate. Roaming users who can't reach their
dnl # preferred sendmail daemon due to port 25 being blocked or redirected find
dnl # this useful.
dnl #
DAEMON_OPTIONS(`Port=25, Name=MSA')dnl
dnl #
dnl # The following causes sendmail to additionally listen to port 465, but
dnl # starting immediately in TLS mode upon connecting. Port 25 or 587 followed
dnl # by STARTTLS is preferred, but roaming clients using Outlook Express can't
dnl # do STARTTLS on ports other than 25. Mozilla Mail can ONLY use STARTTLS
dnl # and doesn't support the deprecated smtps; Evolution <1.1.1 uses smtps
dnl # when SSL is enabled-- STARTTLS support is available in version 1.1.1.
dnl #
dnl # For this to work your OpenSSL certificates must be configured.
dnl #
dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
dnl #
dnl # The following causes sendmail to additionally listen on the IPv6 loopback
dnl # device. Remove the loopback address restriction listen to the network.
dnl #
dnl # NOTE: binding both IPv4 and IPv6 daemon to the same port requires
dnl #        a kernel patch
dnl #
dnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6')dnl
dnl #
dnl # We strongly recommend not accepting unresolvable domains if you want to
dnl # protect yourself from spam. However, the laptop and users on computers
dnl # that do not have 24x7 DNS do need this.
dnl #
FEATURE(`accept_unresolvable_domains')dnl
dnl #
dnl FEATURE(`relay_based_on_MX')dnl
dnl #
dnl # Also accept email sent to "localhost.localdomain" as local email.
dnl #
LOCAL_DOMAIN(`localhost.localdomain')dnl
dnl #
dnl # The following example makes mail from this host and any additional
dnl # specified domains appear to be sent from mydomain.com
dnl #
dnl MASQUERADE_AS(`mydomain.com')dnl
dnl #
dnl # masquerade not just the headers, but the envelope as well
dnl #
dnl FEATURE(masquerade_envelope)dnl
dnl #
dnl # masquerade not just @mydomainalias.com, but @*.mydomainalias.com as well
dnl #
dnl FEATURE(masquerade_entire_domain)dnl
dnl #
dnl MASQUERADE_DOMAIN(localhost)dnl
dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl
dnl MASQUERADE_DOMAIN(mydomainalias.com)dnl
dnl MASQUERADE_DOMAIN(mydomain.lan)dnl
MAILER(smtp)dnl
MAILER(procmail)dnl

文件中，紅色字體的行為需要修改的地方，共有五行需要修改。
第一行是手動添加的，與認證無關，作用是啟動多個郵件隊列，為了獲得更好的傳輸性能。
第二行和第三行是去掉行首的注釋。”TRUST_AUTH_MECH”的作用是使sendmail不管access文件中如何設置，都能 relay 那些通過EXTERNAL, LOGIN, PLAIN, CRAM-MD5或DIGEST-MD5等方式驗證的郵件，”confAUTH_MECHANISMS" 的作用是確定系統的認證方式。Outlook Express支持的認證方式是LOGIN。
第四行是加上注釋，以便讓sendmail可以偵聽所有網絡設備，為整個網絡提供服務，而不僅僅只對本機提供服務。
第五行是修改的，原來內容是:
dnl DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl
去掉行首的注釋符，并且將內容修改成Port=25:
DAEMON_OPTIONS(`Port=25, Name=MSA')dnl
在smtp的默認端口（25）上進行認證，而不是587端口。這樣就強制所有使用該郵件服務器進行郵件轉發的用戶在認證后才能發郵件了。


2.運行：
# m4 /etc/mail/sendmail.mc >/etc/mail/sendmail.cf
用m4重新生成sendmail.cf文件

修改local-host-names文件，加入mail.lapkeung.com

修改access文件，加入：

mail.lapkeung.com                  RELAY
lapkeung.com                       RELAY

生成庫文件
# makemap hash /etc/mail/access.db < /etc/mail/access

3.   既然我們打開了多個隊列，現在我們在/var/spool/mqueue/下創建任意多個隊列目錄，運行：
# cd /var/spool/mqueue
# mkdir q1 q2 q3 q4 q5 q6

4.        修改/etc/mail/local-host-names，將希望該郵件服務器使用的郵箱名加進去，比如郵箱為：xxx@abc.com.cn則將abc.com.cn加入到該文件中。
5.        重新啟動sendmail服務，運行：
# killall –HUP sendmail

# service sendmail restart
6.        可以通過telnet 本機IP 25來驗證sendmail服務是否已經正常啟動，若登陸成功，則說明sendmail服務已經成功啟動。
# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'
220 localhost.localdomain ESMTP Sendmail 8.12.8/8.12.8; Wed, 12 May 2004 15:57:01 +0800
ehlo localhost
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-AUTH GSSAPI LOGIN PLAIN
250-DELIVERBY
250-HELP
quit
#
在AUTH后面有LOGIN就基本上可以在OutlookExpress上認證了。

二.         Pop3服務配置：（pop3是在AS4上的新改動！   ^!^）

為了安裝POP3服務器，您需要安裝dovecot包。以下面的RPM查詢命令查看dovecot是否已安裝在系統中：
#rpm -q dovecot
沒安裝的話,這個RPM包在第4張光盤上.
1.  # service dovecot start

啟動 Dovecot Imap： [ 確定 ]

2. 修改/etc/dovecot.conf文件：

#protocols = imap imap3
更改為：
protocols = imap imap3 pop3 pop3s

缺省的ports:
imap: 143
imaps: 993
pop3: 110
pop3s: 995
保存后退出,

然后重啟 dovecot

#sbin/service dovecot restart

測試

[root@localhost mail]#telnet 127.0.0.1 110

trying 127.0.0.1....

connected to localhost.localdomain(127.0.0.1)

Escape character is `^`]`

+ok dovecot ready

出現上面的提示就表明pop3正常在運行了