Using fancyhdr to handle headers of different sizes

Question

I want to use fancyhdr in the letter document class to define a custom header for the first page only. I know that I can use \fancypagestyle to do this (as is discussed here), but the problem is that my first-page header contains several rows, and I don't want the following pages to contain white space at the top that results from the 'missing' header. Is there a fix for this?

Answer 1

I wanted specific margins in my front-page, and following code helped me to specify margins for only that page. After \begin{titlepage} I put:

\usepackage[paper=a4paper]{geometry}
...
\pagestyle{empty}
\newgeometry{top=1in,bottom=1in,right=1in,left=1in}