diff --git a/README.md b/README.md
index ad9af1a..4bc5a56 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ automx2 is successor to automx. It has been designed to be easier to setup, easi
 
 ## Copyright
 
-automx2 is Copyright © 2019-2022 Ralph Seichter. Parts of the initial documentation were written by Patrick Ben Koetter.
+automx2 is Copyright © 2019-2022 Ralph Seichter.
 automx2 is licensed under the GNU General Public License V3 or later. The project is hosted on GitHub in the
 [rseichter/automx2](https://github.com/rseichter/automx2) repository and published on
 [PyPI.org](https://pypi.org/project/automx2/).
diff --git a/docs/automx2.adoc b/docs/automx2.adoc
index e348fba..c109606 100644
--- a/docs/automx2.adoc
+++ b/docs/automx2.adoc
@@ -4,7 +4,7 @@
 :keywords: autoconfig, autodiscover, mobileconfig, automx, automx2
 :subject: automx2: Email client configuration made easy
 :revnumber: 2022.0
-:revdate: 2022-03-31
+:revdate: 2022-05-05
 :copyright: © 2019-2022 Ralph Seichter
 :publisher: Ralph Seichter
 :lang: en
@@ -27,7 +27,6 @@
 == Copyright
 
 automx2 is Copyright © 2019-2022 Ralph Seichter.
-Parts of the preliminary documentation were written by Patrick Ben Koetter.
 automx2 is licensed under the GNU General Public License V3 or later.
 The project is hosted on GitHub in the https://github.com/rseichter/automx2[rseichter/automx2] repository.
 
@@ -53,4 +52,8 @@ include::dbupgrade.adoc[]
 include::ldap.adoc[]
 include::running.adoc[]
 include::webserver.adoc[]
-include::sponsorship.adoc[]
+
+[[sponsorship]]
+== Sponsorship
+
+If you are interested in sponsoring a specific feature, please contact me using the email address _<automx2 AT_ _seichter DOT_ _de>_.
diff --git a/docs/automx2.pdf b/docs/automx2.pdf
index 82ff809..e5f7df1 100644
Binary files a/docs/automx2.pdf and b/docs/automx2.pdf differ
diff --git a/docs/index.html b/docs/index.html
index 1293dec..c079fd7 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -659,7 +659,7 @@
 <h1>automx2: Email client configuration made easy</h1>
 <div class="details">
 <span id="revnumber">version 2022.0,</span>
-<span id="revdate">2022-03-31</span>
+<span id="revdate">2022-05-05</span>
 </div>
 <div id="toc" class="toc2">
 <div id="toctitle">Table of Contents</div>
@@ -718,7 +718,6 @@ <h2 id="copyright"><a class="anchor" href="#copyright"></a>1. Copyright</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>automx2 is Copyright © 2019-2022 Ralph Seichter.
-Parts of the preliminary documentation were written by Patrick Ben Koetter.
 automx2 is licensed under the GNU General Public License V3 or later.
 The project is hosted on GitHub in the <a href="https://github.com/rseichter/automx2">rseichter/automx2</a> repository.</p>
 </div>
@@ -1746,23 +1745,7 @@ <h3 id="apache"><a class="anchor" href="#apache"></a>11.2. Apache</h3>
 <h2 id="sponsorship"><a class="anchor" href="#sponsorship"></a>12. Sponsorship</h2>
 <div class="sectionbody">
 <div class="paragraph">
-<p>Sponsors for this project include (in alphabetical order)</p>
-</div>
-<div class="ulist">
-<ul>
-<li>
-<p><a href="https://www.jetbrains.com/" target="_blank" rel="noopener">JetBrains s.r.o.</a></p>
-</li>
-<li>
-<p><a href="https://www.mediabeam.com/" target="_blank" rel="noopener">mediaBEAM GmbH</a></p>
-</li>
-<li>
-<p><a href="https://sys4.de/" target="_blank" rel="noopener">sys4 AG</a>.</p>
-</li>
-</ul>
-</div>
-<div class="paragraph">
-<p>If you are interested in sponsoring a specific feature yourself, please contact me using the email address <em>&lt;automx2 AT</em> <em>seichter DOT</em> <em>de&gt;</em>.</p>
+<p>If you are interested in sponsoring a specific feature, please contact me using the email address <em>&lt;automx2 AT</em> <em>seichter DOT</em> <em>de&gt;</em>.</p>
 </div>
 </div>
 </div>
@@ -1770,7 +1753,7 @@ <h2 id="sponsorship"><a class="anchor" href="#sponsorship"></a>12. Sponsorship</
 <div id="footer">
 <div id="footer-text">
 Version 2022.0<br>
-Last updated 2022-03-31 11:58:54 +0200
+Last updated 2022-05-05 17:59:40 +0200
 </div>
 </div>
 </body>
diff --git a/docs/sponsorship.adoc b/docs/sponsorship.adoc
deleted file mode 100644
index ee4a025..0000000
--- a/docs/sponsorship.adoc
+++ /dev/null
@@ -1,12 +0,0 @@
-// vim:ts=4:sw=4:et:ft=asciidoc
-
-[[sponsorship]]
-== Sponsorship
-
-Sponsors for this project include (in alphabetical order)
-
-* https://www.jetbrains.com/[JetBrains s.r.o.,window=_blank]
-* https://www.mediabeam.com/[mediaBEAM GmbH,window=_blank]
-* https://sys4.de/[sys4 AG,window=_blank].
-
-If you are interested in sponsoring a specific feature yourself, please contact me using the email address _<automx2 AT_ _seichter DOT_ _de>_.