安全漏洞
最近一直觉得自己的邮件服务器的垃圾邮件明显增多，于是仔细检查了一下，发现灰名单策略放的太过靠后，以至于前面的一个策略使得灰名单能够被轻易绕过。查了一下db的时间，原来这已经持续很久了，怪不得。。。
Greylisting
共 3 篇文章。
Postfix releases RC5 (final RC)
Wietse Venema has released postfix 2.1-RC5 yesterday, and this is expected to be the final Release Candidate of postfix 2.1-RELEASE.
postfix to have greylisting in 2.1-RELEASE!
It seems that postfix 2.1-RELEASE will include an amazing feature called “policy server”, which can be used to implement greylisting, a brand new and effective technique to fight against spammers.