Formal Letter

\documentclass[11pt,a4paper]{letter}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[a4paper,margin=2.5cm]{geometry}
\usepackage[hidelinks]{hyperref}

\signature{First Last \\ Senior Analyst}
\address{First Last \\ 123 Example Way \\ City, Country 00000 \\ [email protected]}

\begin{document}

\begin{letter}{%
  Ms. Jane Doe \\
  Director of Operations \\
  Acme Corporation \\
  500 Industrial Blvd \\
  City, Country 11111%
}

\opening{Dear Ms. Doe,}

I am writing to formally propose a collaboration between Example Analytics
and Acme Corporation on the upcoming Q3 logistics optimization project. Our
team has followed Acme's work closely over the past eighteen months and
believes there is considerable value we can add.

Over the last three years, Example Analytics has delivered supply-chain
optimization systems for seven Fortune 500 firms, reducing average last-mile
delivery costs by 14\% and shrinking lead times by roughly two days. We would
welcome the opportunity to apply these tools and methods to your specific
operational constraints.

I have attached a preliminary scope of work outlining the proposed engagement,
along with case studies from two prior projects of comparable size. I would be
grateful for the chance to discuss the proposal in greater depth at your
convenience. Please feel free to reach me directly at the address above, or
by telephone at +1 (555) 123-4567.

Thank you for your consideration. I look forward to hearing from you.

\closing{Yours sincerely,}

\encl{Scope of work; two case studies}
\cc{Example Analytics -- Partnerships Office}

\end{letter}
\end{document}