Linux服务器---邮件服务spam

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一生有你llx 2022-04-24 17:05:42 ©著作权

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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`

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: <GTUBE1.1010101@example.net>` `Date: Wed, 23 Jul 2003 23:30:00 +0200` `From: Sender <sender@example.net>` `To: Recipient <recipient@example.net>` `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):` `XJSC4JDBQADN1.NSBN32IDNENGTUBE-STANDARD-ANTI-UBE-TEST-EMAILC.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

Linux服务器---邮件服务spam_spam

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 <20180821004332.M42441@mailsrv.david.cn> 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=<20180821004332.M42441@mailsrv.david.cn>,autolearn=no` `Aug 21 08:44:26 localhost postfix/pipe[6443]: 3F2FD14141A: to=<david@mailsrv.david.cn>,` `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`