\setkomavar{fromemail}{foo} not shown

Question

The following letter document does not show the email address, that should be triggered by command

\setkomavar{fromemail}{[email protected]}

Hereunder the full tex document

\documentclass[
  fontsize=11pt,
  paper=a4,
  parskip=half,
  enlargefirstpage=on,    % More space on first page
  fromalign=right,        % PLacement of name in letter head
  fromphone=on,           % Turn on phone number of sender
  fromrule=aftername,     % Rule after sender name in letter head
  addrfield=on,           % Adress field for envelope with window
  backaddress=on,         % Sender address in this window
  subject=beforeopening,  % Placement of subject
  locfield=narrow,        % Additional field for sender
  foldmarks=on,           % Print foldmarks
]{scrlttr2}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{blindtext}

\setkomafont{fromname}{\sffamily \LARGE}
\setkomafont{fromaddress}{\sffamily}%% statt \small
\setkomafont{pagenumber}{\sffamily}
\setkomafont{subject}{\bfseries}
\setkomafont{backaddress}{\mdseries}

\LoadLetterOption{DIN}
\setkomavar{fromname}{Mario Rossi}
\setkomavar{fromaddress}{Via Roma 2,\\Frascati}
\setkomavar{fromphone}{+39 \,00\,00\,00\,000}
\setkomavar{fromemail}{[email protected]} % NON VIENE VISUALIZZATA
\setkomavar{backaddressseparator}{\enspace\textperiodcentered\enspace}
\setkomavar{signature}{(Mario Rossi)}
\setkomavar{place}{Frascati}
\setkomavar{date}{\today}
\setkomavar{enclseparator}{: }

\begin{document}
  \begin{letter}{To: Claire Laterfield}
    \setkomavar{subject}{Greetings}
    \opening{Dear Claire,}
    I am writing this letter because I have nothing better to do.

    \closing{Sincerely,}
  \end{letter}
\end{document}

Answer 1

Just add class option fromemail=true, or fromemail=on, to your code.

MWE:

\documentclass[
  fontsize=11pt,
  paper=a4,
  parskip=half,
  enlargefirstpage=on,    % More space on first page
  fromalign=right,        % PLacement of name in letter head
  fromphone=on,           % Turn on phone number of sender
  fromrule=aftername,     % Rule after sender name in letter head
  fromemail=on,           % <===========================================
  addrfield=on,           % Adress field for envelope with window
  backaddress=on,         % Sender address in this window
  subject=beforeopening,  % Placement of subject
  locfield=narrow,        % Additional field for sender
  foldmarks=on,           % Print foldmarks
]{scrlttr2}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{blindtext}

\setkomafont{fromname}{\sffamily \LARGE}
\setkomafont{fromaddress}{\sffamily}%% statt \small
\setkomafont{pagenumber}{\sffamily}
\setkomafont{subject}{\bfseries}
\setkomafont{backaddress}{\mdseries}

\LoadLetterOption{DIN}
\setkomavar{fromname}{Mario Rossi}
\setkomavar{fromaddress}{Via Roma 2,\\Frascati}
\setkomavar{fromphone}{+39 \,00\,00\,00\,000}
\setkomavar{fromemail}{[email protected]} % NON VIENE VISUALIZZATA
\setkomavar{backaddressseparator}{\enspace\textperiodcentered\enspace}
\setkomavar{signature}{(Mario Rossi)}
\setkomavar{place}{Frascati}
\setkomavar{date}{\today}
\setkomavar{enclseparator}{: }

\begin{document}
  \begin{letter}{To: Claire Laterfield}
    \setkomavar{subject}{Greetings}
    \opening{Dear Claire,}
    I am writing this letter because I have nothing better to do.

    \closing{Sincerely,}
  \end{letter}
\end{document}

and see the result: