Maybe this helps - here's the code of my personal standard letter using the scrlttr2 document class.
\documentclass[a4paper]{scrlttr2} % Options % true/on/yes oder false/off/no \KOMAoptions{ parskip=half, fromphone=off, fromrule=off, fromfax=off, fromemail=off, fromurl=off, addrfield=on, foldmarks=true, backaddress=on } % Standard packages \usepackage[latin1]{inputenc} \usepackage[T1]{fontenc} \usepackage[english]{babel} % Additional packages \usepackage{csquotes} \usepackage[]{url} % Some sombols - just in case :) \usepackage{textcomp} %% Setting the Variables \setkomavar{fromname}{Dr.~Manuel Kuehner} \setkomavar{signature}{\small\sffamily Dr.~Manuel Kuehner} \setkomavar{fromaddress}{SomeStreet 2\\ 71706 SomeTown} \setkomavar{fromphone}{0123-123456789 (Mobil)} \setkomavar{fromemail}{[email protected]} \setkomavar{fromurl}{www.manuelkuehner.de} \setkomavar{frombank} {% Konto 000\,000\,000, Postbank Berlin, BLZ 100\,100\,10\\ IBAN DE\,08\,10010010\,123456789, BIC PBNKDEFF } % Footnote with bank account, custom code \setkomavar{firstfoot} {% \parbox[b]{\linewidth} {% \centering\usekomavar{frombank}% }% } % Letter specific information % Leave the {} empty and it will not appear. \setkomavar{customer}{} \setkomavar{subject}{Cancellation} \setkomavar{myref}{--} \setkomavar{yourmail}{} \setkomavar{yourref}{} \setkomavar{invoice}{} \setkomavar{date}{\today} % Date of letter \begin{document} \begin{letter} {% Adressaten Name Name\\ Street Street\\ Town Town } \opening{Dear Mr. Mueller,} \enlargethispage{0\baselineskip} I would like to cancel my newspaper. \closing{Best regards} \ps{} \encl{Attached documents} % comment out if not needed \end{letter} \end{document}
Here's the result of the code above:

But I must admit that it took me a while until I figured out how the document class works and until I was satisfied with the result. But I use it for years now without changing the code.
lettrebecause it's the traditional layout out of letters in French.pictureenvironment, with a number of\parboxes. The default placement and dimensions of these boxes is explained in § 2.7.3 (De l'entête), pp 25-26 of the documentation.letter,scrlttr2,newlfmandisodocare all discussed in Correspondence if that's of any help.