I tried to find out if you can use Posteo with a custom domain. And the short answer is: no.
Andy Schwartzmeyer found out the long answer. 👏😀 I implemented it for my blog and so far I’m happy. Interestingly enough it’s the receiving side that needs an external service. I currently use Forward Email‘s free tier, because I already have publicly known email addresses that I automatically collect emails from.
I always had the impression that sending mails is made more difficult in order to combat spammers, but what do I know. 🤷 Sending only needs to include Posteo in the SPF rules and adding a sender identity (usable after a one week cool down 🙈).
What could go wrong if-as a joke-your being asked if you could hack the former prime minister of Australia Tony Abbott? Well Alex Hope has documented it. Finding pictures of boarding pass he could log into the booking system of the airline (without additional authentication). Then he found out that the systems leaked sensitive information (passport number, telephone number, airline-internal comments about the passenger). He then went through the whole charade of finding someone in government responsible for concrete data security issues. 😵
There’s even an interesting section on when he finally gets through to Tony Abbot and they talk on a very personal level. Given the reason they were talking in the first place it also revolved about how complicated technology seems to be and how you learn how it works.
This lead Alex to reflect about how he started learning things and how you have to change your thinking when you are “hacking.” He gives a great example which he summarizes with:
In conclusion, to be a hacker u ask for tap water.
George from Designed by Cave has a beautiful piece on the UX of LEGO interface panels (those sloped 2×2 bricks with stuff printed on them). He even utilizes them to illustrate principles of UI design. 😀
Linux has historically had poor swap (and by extension OOM) handling with few and imprecise means for configuration. Chris describes the behavior of a machine with and without swap in different scenarios of memory contention. He thinks that poor swap performance is caused by having a poor measure of “memory pressure.” He explains how work on cgroups v2 might give the kernel (and thus admins) better measures for memory pressure and knobs for dealing with it.