共 4 篇文章。
说明：这是一篇作弊条，应光棍节的postfix活动网友要求而撰写，因此原理等会尽可能少介绍，只讲过程。
前提：安装了amavisd-new并配置正确。
需求：阻止图片垃圾邮件。
方案：安装FuzzyOCR插件。
注意：高负载服务器请小心使用。
cd /usr/ports/mail/p5-FuzzyOcr/ && make install clean
[下载一个靠谱的操作系统并确保可重现、可维护地安装应用程序]
今天 hengdm 同学投诉说他无法接收某个来自国内著名邮件服务提供商的邮件，一看果然被spamassassin拦住(注意我已经大大放宽了杀信的尺度)，结果是：
X-Spam-Status: Yes, score=14.944 tag=2 tag2=6.31 kill=8.6 tests=[AWL=-0.927, BAYES_99=4.3, DNS_FROM_RFC_ABUSE=0.2, DNS_FROM_RFC_DSN=2.597, DNS_FROM_RFC_POST=1.708, FROM_EXCESS_BASE64=1.309, HTML_FONT_FACE_BAD=0.156, HTML_MESSAGE=0.001, HTML_OBFUSCATE_10_20=1.77, MIME_BASE64_NO_NAME=0.224, MIME_BASE64_TEXT=1.885, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, SUBJECT_ENCODED_TWICE=1.723]
X-Spam-Score: 14.944
It’s believed that blog is going to be a victim of business spams, after mail spams :(
Finally I have built it and deployed it. Apparantly, it DOES NOT WORK(detects spams correctly, but did not take any actions!), but I hope the virus filter will be working, as the viruses are growing too fast.