Email

很郁闷，不知道什么时候才能好。。。

So someone has hacked 210.51.165.42, which apparantly is an open proxy that can lead to attacks. The box has tried to trick my mail server into trusting him and thus relay spams, but my postfix configurations has rejected all its requests. Considering to have pf configuration to avoid it…

As title, congratulations to him.

最近在CU论坛的历险记。

讨论最开始是由有位大哥求助如何在FreeBSD中移去sendmail引发的。嗯，这将导致不幸，提醒一下。

接下来老大说sendmail是系统自带的，不像Solaris或Linux那样用包安装，但他要弄掉，弄得很干净。

呃……显然啊，FreeBSD不是一个组装的玩意，它提供了很多内建的东西，不过对于那些热爱自己DIY的人还是应该鼓励一下，于是回帖说用NO_SENDMAIL阻止构建，然后installworld之后删除没有碰过的文件。最后出于好意提醒了一句，「默认安装的留在那不会给你带来很大的损失，但删除可能会带来意想不到的后果。」

Spammers get smarter. My e-mail server has passed one or two spams for me each day, which is much more than it used to be.

They begin to use GIFs for sending spams… So, smarter, smarter spammers are going to win in some areas, but…

We have something to stop this! Hahaha… Let me try!

Yes, finally postfix is supporting DSN. To quote Witese, this is the first postfix snapshot which provides “full support for RFC 3461..3464 Delivery Status Notifications”!

由于某种原因需要一口气inject大约80万封信，结果中间就不成了。后来发现似乎3000-10000/queue为宜。什么原因呢？

A decision was made to enable SPF on beastie. SPF is a technology that mitigates forged spam (while it itself is not totally spam proof, as spammers can set up their own SPF record :-)

Today, Wietse Venema has announced postfix 2.2.0-RELEASE. To quote him:

The official Postfix 2.2 release adopts widely used third-party patches and a bunch of new functionality that was developed over the past year.Below is a summary of the changes. These and more are detailed in the RELEASE_NOTES document, which also describe the incompatible changes that you should be aware of BEFORE upgrading from Postfix
2.1 or earlier.

• TLS and IPv6 support are now built into Postfix, based on code
  from third-party patches.

• Extended query interface for LDAP, MySQL and PostgreSQL with free
  form SQL queries, and domain name filters to reduce unnecessary
  lookups.

引用我自己写的一段说明（部分文字作了混淆处理）：

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