\documentclass[
%DIN,
%paper=a4,
%enlargefirstpage,
%pagenumber=off,
DIVcalc,
%
addrfield=on, %Anschrift setzen
backaddress=off, %Meine Adresse für Fensterbriefumschläge im Anschriftfeld
fromalign=right, %Position des Absenders
fromrule=aftername, %Linie unter Absender
foldmarks=on, %Faltmarken
%
fromphone=off,
fromemail=off,
fromurl=off,
fromlogo=off,
locfield=wide, %erweiterter Absenderangabe
numericaldate=off, %numerisches datum
]{scrlttr2}
\usepackage{ngerman}
\usepackage[T1]{fontenc}
\usepackage[latin1]{inputenc}
\usepackage{url}
%\pagestyle{empty}
%Schriftart ändern und als Standard setzen
\usepackage{helvet}
\renewcommand{\familydefault}{\sfdefault}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
%Pseudolängen zur Veränderung Abständen
%\makeatletter
%\@setplength{firstheadvpos}{4em}
%\@setplength[0]{refhpos}{0em}
%\makeatother
%\@setplength{Pseudolänge}{Wert}
%firstheadvpos
%refwidth
%refhpos
\date{\today}
\setkomavar{fromname}{Vorname Nachname}
\setkomavar{fromaddress}{ Straße Nr. \\ PLZ Ort}
\setkomavar{fromphone}{Vorwahl Nummer}
\setkomavar{fromemail}{E-Mail}
\setkomavar{subject}{Betreff}
\setkomavar{place}{Ort}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{letter}{Vorname Nachname\\Straße Nr. \\PLZ Ort}
\opening{Geehrte/r Herr/Frau}
Brieftext
\closing{Freundliche Grüße}
\encl{Dieses und Jenes}
\end{letter}
\end{document}
