[JdeBP]

Daniel J. Bernstein's original qmail doco and the later security retrospective have come up a number of times on Hacker News.

* http://cr.yp.to/qmail/guarantee.html

* http://cr.yp.to/qmail/qmailsec-20071101.pdf

* https://hillside.net/plop/2004/papers/mhafiz1/PLoP2004_mhafi...

* https://blog.acolyer.org/2018/01/17/some-thoughts-on-securit...