Linux服务器---邮件服务spam

安装spam

      spam（SpamAssassin）利用perl来进行文字分析，他会检测邮件的标题、内容、送信人，这样就可以过滤出垃圾邮件

1、安装spam。由于spam的依赖太多，用户一定要使用yum源来安装，这样减少不必要的麻烦 

[root@localhost ~]# rpm -qa | grep spamassassin [root@localhost openwebmail]# yum install -y spamassassin Complete!

2、配置postfix使用spam功能，修改配置文件“/etc/postfix/master.cf”

[root@localhost ~]# gedit /etc/postfix/master.cf smtp      inet  n      -       n       -      -       smtpd  -o content_filter=spamassassin spamassassin unix - n n  - - pipe user=nobody argv=/usr/bin/spamc -f /usr/sbin/sendmail -oi -f $(sender) -- $(recipient)  //追加到最后一行 扫描二维码关注公众号，回复： 5263334 查看本文章

3、重启postfix 

[root@localhost openwebmail]# service postfix restart 关闭postfix：                                            [确定] 启动postfix：                                            [确定] [root@localhost openwebmail]#

4、启动spam服务

[root@localhost ~]# service spamassassin start 启动spamassassin：                                            [确定] [root@localhost ~]#

5、测试垃圾邮件。

1）spamassassin为我们提供了一个垃圾邮件的模板“sample-spam.txt”，我们可以使用此模板的内容来发送

[root@localhost openwebmail]# cat /usr/share/doc/spamassassin-3.3.1/sample-spam.txt  Subject: Test spam mail (GTUBE) Message-ID: <[email protected]> Date: Wed, 23 Jul 2003 23:30:00 +0200 From: Sender <[email protected]> To: Recipient <[email protected]> Precedence: junk MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit   This is the GTUBE, the     Generic     Test for     Unsolicited     Bulk     Email If your spam filter supports it, the GTUBE provides a test by which you can verify that the filter is installed correctly and is detecting incoming spam. You can send yourself a test mail containing the following string of characters (in upper case and with no white spaces and line breaks):   XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X      //这就是垃圾邮件的内容   You should send this test mail from an account outside of your network.

2）使用openwebmail发信

         

3）查看邮箱的日志文件。Spam采用积分制，默认超过5分就是垃圾邮件，而我们看到下面识别出的邮件是999分，很明显是垃圾邮件

[root@localhost openwebmail]# cat /var/log/maillog Aug 21 08:44:14 localhost spamd[6401]: spamd: failed to create readable default_prefs: //.spamassassin/user_prefs Aug 21 08:44:14 localhost spamd[6401]: spamd: processing message <[email protected]> for nobody:99 Aug 21 08:44:26 localhost spamd[6401]: spamd: identified spam (999.0/5.0) for nobody:99 in 12.5 seconds, 603 bytes. Aug 21 08:44:26 localhost spamd[6401]: spamd:  result: Y 999 –  ALL_TRUSTED,GTUBE,TVD_SPACE_RATIO scantime=12.5,size=603,user=nobody,uid=99,required_score=5.0,rhost=localhost,raddr=127.0.0.1, rport=33149,mid=<[email protected]>,autolearn=no Aug 21 08:44:26 localhost postfix/pipe[6443]: 3F2FD14141A: to=<[email protected]>, relay=spamassassin, delay=13, delays=0.06/0.03/0/12, dsn=2.0.0, status=sent (delivered via spamassassin service) Aug 21 08:44:26 localhost postfix/qmgr[6368]: 3F2FD14141A: removed Aug 21 08:44:26 localhost spamd[6399]: prefork: child states: II