utf7encode: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/utf7encode - from package: sendfile

You may install the required package with command apt-get install {package}

Error in other languages:
utf7encode: bevel nie gevind nie
utf7encode: comandă negăsită
utf7encode: comando não encontrado
utf7encode: commande introuvable
utf7encode: command not found
utf7encode: käsku ei ole
utf7encode: không tìm thấy lệnh
utf7encode: komanda nerasta
utf7encode: Kommando nicht gefunden.
utf7encode: kommandot finns inte
utf7encode: komut yok
utf7encode: nie znaleziono polecenia
utf7encode: níor aimsíodh an t-ordú
utf7encode: no se encontró la orden
utf7encode: no s'ha trobat l'ordre
utf7encode: opdracht niet gevonden
utf7encode: parancs nem található
utf7encode: perintah tidak ditemukan
utf7encode: príkaz nenájdený
utf7encode: příkaz nenalezen
utf7encode: команда не найдена
utf7encode: командата не е открита
utf7encode: 命令找不到
utf7encode: コマンドが見つかりません