\documentclass[unibrief]{scrlttr2}

\usepackage[ngerman]{babel}  % change language here
\ifpdftex
   \usepackage[utf8]{inputenc}  %  whatever input encoding you use
\fi
\usepackage[math]{blindtext} % remove this line
                      % (unless you need \blindtext)  
\begin{document}

% This text will appear in the top right corner, below
% Fakultaet and Institut
\setkomavar{fromname}{Dr. Meik Hellmund}

% This text is used at the end of the letter
\setkomavar{signature}{Meik Hellmund}  

% your e-mail, phone, fax for the right column 
\setkomavar{fromemail}{Meik.Hellmund@math.uni-1eipzig.de}
\setkomavar{fromphone}{+49\,341\,97-32155}
\setkomavar{fromfax}{+49\,341\,97-39333}

% subject line/Betreff-Zeile
\setkomavar{subject}{Meine Anfrage vom 11.11.}

\begin{letter}{Frau Prof. Miriam Meier\\
     Mathematisches Institut\\
     Uni Woanders\\
     23456 Woanders}

  
\opening{Sehr geehrte Frau Professor Meier,}

\blindtext

\Blindtext

\closing{Mit freundlichen Grüßen}

% Anlagen
\encl{22 Aufkleber\\
      11 Kaubonbons}

\end{letter}
\end{document}

% Note:
% you have to "latex" this twice, since the page numbers are of the
% form "1|3", "2|3", "3|3" and the "|3" is only known after the
% first latex run
% -----------------------------------EOF----------------------------