\hypersetup{colorlinks = false}%
\teckidsgeometry[margin=2cm]%
% note: not in teckids2style as some pubmats use P for RaggedRight
\newcolumntype{P}[1]{>{\centering\arraybackslash}p{#1}}%

\setkomavar{signature}{\errmessage{komavar signature not set}}% ← set in each letter!

\newkomavar{fromstreet}%
\newkomavar{fromdistrict}%
\newkomavar{fromco}%

\setkomavar{fromname}{Teckids e.V.}%
\setkomavar{fromstreet}{Kennedyallee 18}%
\setkomavar{fromdistrict}{53175 Bonn}%
\setkomavar{fromemail}{\emaillink{verein@teckids.org}}%
\setkomavar{fromphone}{+49 228 9293416‒0}%
\setkomavar{fromfax}{+49 228 9293416‒9}%
\setkomavar{fromurl}{https://www.teckids.org/}%

\setkomavar{backaddressseparator}{ \textperiodcentered\  }%
\setkomavar{fromaddress}{\usekomavar{fromstreet}\usekomavar[\\]{fromdistrict}}%
\setkomavar{fromlogo}{\includegraphics[height=60pt]{teckids_logo}}%
\setkomavar{location}{\begin{tabular}[t]{@{}rl}
\Letter & \usekomavar{fromname} \\
& \usekomavar{fromstreet} \\
& \usekomavar{fromdistrict} \\
\Telefon & \usekomavar{fromphone} \\
\Faxmachine & \usekomavar{fromfax} \\
\MVAt & \usekomavar{fromemail} \\
\Info & \usekomavar{fromurl} \\
\end{tabular}}%

\setkomavar{firsthead}{\hfill\usekomavar{fromlogo}}%

\setkomavar{firstfoot}{%
 \parbox[t]{\textwidth}{\footnotesize%
\begin{tabularx}{\linewidth}[t]{@{}p{.75\linewidth} P{.25\linewidth}}
  Vereinsregister Amtsgericht Bonn · VR 9846\newline
  Vorstand: Dominik George, Tom Teichler, Benedict Suska\newline
  Stadtsparkasse KölnBonn · IBAN: \mbox{DE31 3705 0198 1933 0485 46} · BIC: \mbox{COLSDE33XXX}\newline
  Anerkannt als gemeinnützig beim Finanzamt Bonn-Außenstadt\newline
  Steuernummer 206/5879/1026 · USt-ID: DE313359560
 &
  Unterstützt durch:

  \vspace{\baselineskip}%
  \includegraphics[height=3\baselineskip]{logo_informatik-aktuell}%
\end{tabularx}}%
}%

\@addtoplength{firstfootvpos}{-1cm}%
\@addtoplength{firstheadvpos}{0.5cm}%
\@setplength{sigbeforevskip}{1.5ex}

\fancyhf{}
\fancyhead[R]{\leavevmode\usekomafont{pageheadfoot}Seite \thepage\strut}%
\renewcommand{\headruleskip}{2pt}%
\renewcommand{\headrulewidth}{.4pt}%
\renewcommand{\footrulewidth}{0pt}%