Post about importing Outlook mails into KMail.

.devcontainer/devcontainer.json

@@ -16,7 +16,7 @@
 
 	// The optional 'workspaceFolder' property is the path VS Code should open by default when
 	// connected. This is typically a file mount in .devcontainer/docker-compose.yml
-	"workspaceFolder": "/src"
+	"workspaceFolder": "/project",
 
 	// Features to add to the dev container. More info: https://containers.dev/features.
 	// "features": {},
@@ -37,5 +37,5 @@
 	// "customizations": {},
 
 	// Uncomment to connect as an existing user other than the container default. More info: https://aka.ms/dev-containers-non-root.
-	// "remoteUser": "devcontainer"
+	"remoteUser": "root"
 }

.devcontainer/docker-compose.yml

@@ -13,7 +13,7 @@ services:
 
     volumes:
       # Update this to wherever you want VS Code to mount the folder of your project
-      # - ..:/src:cached
+      # - ..:/project:cached
 
     # Uncomment the next four lines if you will use a ptrace-based debugger like C++, Go, and Rust.
     # cap_add:

assets/scss/_fonts.scss

@@ -1,25 +1,3 @@
-// Colors
-$theme: hsl(172, 99%, 26%);
-$text: hsl(204, 28%, 93%);
-$light-grey: #292e32; // #494f5c;
-$dark-grey: #3B3E48;
-$highlight-grey: #7d828a;
-$typewriter: hsl(172, 100%, 36%);
-$codebackground: #1c2023 !default;
-$midnightblue: $codebackground;
-
-// Scroll to Top Default colors
-
-$stt-stroke:#CCC;
-$stt-circle:#3b3e48;
-$stt-arrow:#018574;
-
-kbd {
-  font-size: 0.9em !important;
-  color: inherit;
-  background-color: $midnightblue;
-}
-
 // Fonts
 $fonts: "IBM Plex Sans Light", "Segoe UI", Candara, sans-serif;
 $code-fonts: "IBM Plex Mono Light",  Consolas, "Andale Mono WT", "Andale Mono", Menlo, Monaco, monospace;
@@ -96,46 +74,3 @@ $code-fonts: "IBM Plex Mono Light",  Consolas, "Andale Mono WT", "Andale Mono",
     url('/fonts/IBMPlexMono-MediumItalic.woff2') format('woff2');
 }
 
-//Admonition
-$admonition-background: (
-  'note': rgba(68, 138, 255, 0.1),
-  'info': rgba(0, 184, 212, 0.1),
-  'tip': rgba(0, 191, 165, 0.1),
-  'success': rgba(0, 200, 83, 0.1),
-  'warning': rgba(255, 145, 0, 0.1),
-  'failure': rgba(255, 82, 82, 0.1),
-  'danger': rgba(255, 23, 68, 0.1),
-  'bug': rgba(245, 0, 87, 0.1),
-  ) !default;
-
-$admonition-color: (
-  'note': #448aff,
-  'info': #00b8d4,
-  'tip': #00bfa5,
-  'success': #00c853,
-  'warning': #ff9100,
-  'failure': #ff5252,
-  'danger': #ff1744,
-  'bug': #f50057,
-  ) !default;
-
-// Mixins
-@mixin dimmed {
-  opacity: .6;
-}
-
-@mixin aTag {
-  a {
-    word-wrap: break-word;
-    border: none;
-    box-shadow: inset 0 -4px 0 $theme;
-    transition-property: box-shadow;
-    transition-duration: .1s;
-
-    &:hover {
-      box-shadow: inset 0 -1em 0 $theme;
-    }
-  }
-}
-
-

assets/scss/_userstyles.scss

@@ -0,0 +1,9 @@
+// Typography configuration for typewriter text display
+$font-size-desktop: 1.5rem;          // Base font size for desktop viewports
+$font-size-mobile: 1.2rem;             // Reduced font size for mobile devices
+$line-height: 1.6;                   // Line height multiplier for optimal readability
+
+// Responsive container width settings across device breakpoints
+$width-desktop: 50vw;                // Container width for desktop screens (60% viewport width)
+$width-tablet: 70vw;                 // Container width for tablet screens (70% viewport width)
+$width-mobile: 80vw;                 // Container width for mobile screens (80% viewport width)

content/impressum.md

@@ -9,13 +9,12 @@ Mail: <bovender@bovender.de>
 
 {{< orcid >}}
 
-Ladungsfähige Anschrift bei meinem Arbeitgeber: Universitätsklinikum
-Heidelberg, Im Neuenheimer Feld 162, 69120 Heidelberg.
-Dies ist eine rein private Homepage und in keiner Weise von
-meinem Arbeitgeber beworben oder unterstützt. Meine Privatanschrift ist zu
-meinem persönlichen Schutz und dem Schutz meiner Familie hier nicht
-veröffentlicht. **Ich bitte, von Anrufen abzusehen.** Über Mail oder die
-verlinkten sozialen Netzwerke (siehe Icons) bin ich i.d.R. kurzfristig
+Ladungsfähige Anschrift bei meinem Arbeitgeber: Universitätsklinikum Heidelberg,
+Im Neuenheimer Feld 162, 69120 Heidelberg. **Dies ist eine rein private Homepage
+und in keiner Weise von meinem Arbeitgeber beworben oder unterstützt.** Meine
+Privatanschrift ist zu meinem persönlichen Schutz und dem Schutz meiner Familie
+hier nicht veröffentlicht. **Ich bitte, von Anrufen abzusehen.** Über Mail oder
+die verlinkten sozialen Netzwerke (siehe Icons) bin ich i.d.R. kurzfristig
 erreichbar.
 
 ## Mailserver bovender.de
@@ -35,8 +34,8 @@ Der Mailserver bovender.de ist zuständig für die Domains:
 
 ## Datenschutz
 
-Diese Website erfasst keine personenbezogenen Daten, und es werden keine
-Dienste von Drittfirmen in Anspruch genommen.
+Diese Website erfasst keine personenbezogenen Daten, und es werden keine Dienste
+von Drittfirmen in Anspruch genommen.
 
 Es findet eine anonymisierte Erfassung von Seitenbesuchen statt, die keine
 Rückverfolgung zu einzelnen Personen/Geräten ermöglicht.

content/posts/2024/dane-tlsa-record-for-letsencrypt/index.md

@@ -211,5 +211,37 @@ Query TLSA records:
   more useful for me than all the websites and blog and forum posts that I had
   previously read.
 
+---
+
+# Addendum 2026-04-22
+
+## How to produce the certificate-associated data for the TLSA record?
+
+The certificate associated data is a SHA-256 or SHA-512 checksum, depending
+on the third number.
+
+```plain
+2 1 1 cbbc559b44d524d6a132bdac672744da3407f12aae5d5f722c5f6c7913871c75 # E7
+#     ^^^ this is the certificate-associated data in the TLSA record
+```
+
+```bash
+openssl x509 -in E7.der -pubkey -noout | openssl ec -pubin -outform der | openssl sha256
+```
+
+### Obtain the hash for the certificate itself (DANE-EE)
+
+Given a ECDSA key in `cert.pem`:
+
+```bash
+openssl x509 -in cert.pem -pubkey -noout | openssl ec -pubin -outform der | openssl sha256
+```
+
+Use the resulting hash in
+
+```plain
+3 1 1 HASH
+```
+
 [dane]: https://en.wikipedia.org/wiki/DNS-based_Authentication_of_Named_Entities
 [isi]: https://dnssec-stats.ant.isi.edu/~viktor/x3hosts.html

content/posts/2026/disk_speeds/index.md

@@ -14,6 +14,8 @@ tags:
   - photography
 ---
 
+{{< figure src="cfexpress_type_b_card.jpg" >}}
+
 I've been looking for a card reader for my CFexpress Type B cards that I use in
 my camera. There are not very many devices on the market, but they have a large
 price span: around 10x.
@@ -41,6 +43,21 @@ I did not want to overcomplicate things, just get an impression if there are any
 differences between card readers or not. Therefore I decided to perform
 sequential read and write tests using `dd` as described at [Baeldung.com][].
 
+These are the commands that I used in [Fish][] shell; Bash has slightly
+different syntax.
+
+```fish
+#!/usr/bin/fish
+echo "*** Sequential write test ***"
+for i in (seq 1 5); dd if=/dev/zero of=/run/media/daniel/NIKON\ Z6_3/tempfile bs=1M count=1024 conv=fdatasync; end
+echo
+echo "*** Sequential read test ***"
+for in in (seq 1 5); sudo sh -c "/usr/bin/echo 3 > /proc/sys/vm/drop_caches" && dd if=/run/media/daniel/NIKON\ Z6_3/tempfile of=/dev/null bs=1M count=1024; end
+rm /run/media/daniel/NIKON\ Z6_3/tempfile
+```
+
+## Results
+
 The graph below shows the means and standard deviations of 5 tests for each
 device. The "direct" label denotes tests with the card reader attached directly
 to a USB-C/USB 3.2 Gen 2 port of my [Thinkpad P14s][] laptop, rather than via
@@ -105,6 +122,7 @@ build, and the UGREEN reader is a strong contender when it comes to small size.
 
 [baeldung.com]: https://www.baeldung.com/linux/disk-performance-test
 [darktable]: https://darktable.org
+[Fish]: https://fishshell.com
 [local-copies]: https://docs.darktable.org/usermanual/development/en/overview/sidecar-files/local-copies/
 [Thinkpad P14s]: {{< relref "p14s" >}}
 [Wikipedia article on USB 3.2]: https://en.wikipedia.org/wiki/USB_3.0#3.2

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content/posts/2026/import-outlook-pst-into-kmail/index.md

@@ -0,0 +1,116 @@
+---
+title: How to import emails from a .pst file into KMail
+description: >
+  Using a tool called "readst" you can transfer emails from an Outlook
+  account into any other email client, for example KMail.
+date: 2026-05-15T17:30:00+02:00
+draft: false
+# ShowLastmod: true
+scrolltotop: true
+images: []
+tags:
+  - email
+  - KDE
+  - Linux
+---
+
+Here I describe how I imported an email archive from Outlook to KDE's
+[KMail][]. This turned out to be harder than expected.
+
+My machine is a Fedora 44 KDE box, but the procedure should be the same or at
+least very similar on other Linux systems.
+
+## Prerequisites
+
+Let's assume the following:
+
+1. An Outlook archive file named `archive.pst`.
+2. Inside this archive file: An email folder structure with first-level folders
+   in the style of `MyFolder1`, `MyFolder2` etc. and subfolder
+   `MyFolder1/MyFolder1Subfolder1` and so on.
+
+I use the venerable [readpst][] tool to extract folders and emails from the
+archive file. It's included in common Linux distributions, but at least on
+Fedora you don't install it directly, but rather the `libpst` package:
+
+```fish
+sudo dnf install libpst
+```
+
+```fish
+# dnf info libpst
+Updating and loading repositories:
+Repositories loaded.
+Installed packages
+Name            : libpst
+Epoch           : 0
+Version         : 0.6.76
+Release         : 28.fc44
+Architecture    : x86_64
+Installed size  : 192.7 KiB
+Source          : libpst-0.6.76-28.fc44.src.rpm
+From repository : <unknown>
+Summary         : Utilities to convert Outlook .pst files to other formats
+URL             : http://www.five-ten-sg.com/libpst/
+License         : GPL-2.0-or-later
+Description     : The Libpst utilities include readpst which can convert email messages
+                : to both mbox and MH mailbox formats, pst2ldif which can convert the
+                : contacts to .ldif format for import into ldap databases, and pst2dii
+                : which can convert email messages to the DII load file format used by
+                : Summation.
+Vendor          : Fedora Project
+```
+
+## Working solution as of 2026
+
+Modern [KMail] does not store emails in the traditional storage formats such
+as [Maildir] or [Mbox]. It uses KDE's Akonadi database system. Therefore,
+we need to first export all folders and emails from the Outlook data file,
+then import these into KMail's database using the `File > Import Messages...`
+command.
+
+At first, I struggled a bit to find the correct output format option to make
+it work. `readpst` offers a number of different formats -- basically various
+flavors of the [MH][]/[maildir][] and the [mbox][] structures. It did _not_ work
+with the `-k` option that is meant to produce a dedicated KMail format. I ended
+up using the simple `-e` option that produces a directory structure according
+to the folders in the Outlook archive, with one separate file for each email
+message.
+
+1. Export folders and emails from the Outlook data file:
+
+    ```fish
+    readpst -e archive.pst
+    ```
+
+    There is no need to create and specifiy a dedicated directory, because
+    `readpst` will create a directory structure with a generic top-level
+    directory (in German, this directory is called "Outlook-Datendatei",
+    Outlook data file).
+
+2. Import the folder structure and emails into KMail:
+
+    a. In the `File` menu, choose `Import Messages...`.
+
+    b. In the Import dialog that appears, choose "Import KMail Maildirs and
+    Folder Structure".
+
+    {{< figure src="kmail-import-dialog.png" >}}
+
+    c. At the bottom of the dialog where it says "Please select the folder to
+    import to", click on the folder icon. Choose the existing "Local Folders".
+    There is no need to create an extra folder for the import because KMail
+    will create folder "KMail-Import" just for you.
+
+    d. Click on "Next" and choose your `.pst` file.
+
+    e. Start the import process.
+
+3. All imported messages are marked as unread at first, but this will go away
+   after a while.
+
+[KMail]: https://apps.kde.org/kmail2
+[maildir]: https://en.wikipedia.org/wiki/Maildir
+[MH]: https://en.wikipedia.org/wiki/MH_Message_Handling_System
+[mbox]: https://en.wikipedia.org/wiki/Mbox
+[readpst]: https://www.five-ten-sg.com/libpst/rn01re01.html

docker-compose.yml

@@ -1,17 +1,21 @@
 services:
   build:
-    image: hugomods/hugo:ci
-    command: hugo 
+    # image: hugomods/hugo:ci
+    image: ghcr.io/gohugoio/hugo
+    command: build 
     volumes:
-      - ".:/src"
+      - ".:/project"
     user: 1000:1000
   server:
-    image: hugomods/hugo:ci
-    command: server --buildDrafts --buildFuture
+    # image: hugomods/hugo:exts
+    image: ghcr.io/gohugoio/hugo
+    command: server --bind 0.0.0.0 --buildDrafts --buildFuture
     volumes:
-      - ".:/src"
+      # - ".:/src"
+      - ".:/project"
     ports:
       - "127.0.0.1:1313:1313"
     user: 1000:1000
     environment:
-      - TZ=Europe/Berlin
+      ENVIRONMENT: development
+      TZ: Europe/Berlin

pull-and-update.sh

@@ -4,6 +4,6 @@ set -e
 # https://stackoverflow.com/a/1482133/270712
 MYDIR=`dirname -- "$( readlink -f -- "$0"; )";`
 pushd "$MYDIR"
-git pull
+git pull --recurse-submodules
 docker compose -f docker-compose.yml up build
 popd

update-blog.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 pushd /home/daniel/local/Code/blog
-docker compose up build && rsync -av --delete public/* bovender.de:/var/docker-data/nginx/www/bovender/
+docker compose up build && rsync -e "ssh -i /home/daniel/.ssh/id_rsa" -av --delete public/* bovender.de:/var/docker-data/nginx/www/bovender/
 popd