Computer books change over time, for obvious reasons. The O'Reilly animal books are always good, but they've removed some useful information in later editions. For instance, the [sendmail bat book](https://www.oreilly.com/library/view/sendmail-4th-edition/97...) originally talked about all sorts of ways to deal with resource limits, particularly memory, because this was often an issue…
How many greybeards here remember the O'reilly Sendmail bat book[1]? I built an ISP off of deciphering cryptic sendmail.cf parameters from it. This is what the "fix" in Postfix aims to "fix". (Although the Postfix config files are no walk in the park either.)…
计算机书籍随着时间推移会发生变化，原因显而易见。O'Reilly 的动物书一直很棒，但他们在后来的版本中删掉了一些有用的信息。比如，那本[sendmail 蝙蝠书](https://www.oreilly.com/library/view/sendmail-4th-edition/97...)最初探讨了应对各种资源限制的手段，尤其是内存限制，因为这在当年经常是个痛点……
Computer books change over time, for obvious reasons. The O'Reilly animal books are always good, but they've removed some useful information in later editions. For instance, the [sendmail bat book](https://www.oreilly.com/library/view/sendmail-4th-edition/97...) originally talked about all sorts of ways to deal with resource limits, particularly memory, because this was often an issue…
这里的元老级老极客（greybeards）还有多少人记得 O'Reilly 的 Sendmail 蝙蝠书[1]？我当年靠着从那本书里解读晦涩难懂的 sendmail.cf 参数，硬生生搞起了一家 ISP。这就是 Postfix 里的那个“fix”（修复）想要“修”掉的东西。（虽说 Postfix 的配置文件搞起来也绝非易事就是了。）……
How many greybeards here remember the O'reilly Sendmail bat book[1]? I built an ISP off of deciphering cryptic sendmail.cf parameters from it. This is what the "fix" in Postfix aims to "fix". (Although the Postfix config files are no walk in the park either.)…