dl10n-mail: 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/dl10n-mail - from package: dl10n

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

Error in other languages:
dl10n-mail: bevel nie gevind nie
dl10n-mail: comandă negăsită
dl10n-mail: comando não encontrado
dl10n-mail: commande introuvable
dl10n-mail: command not found
dl10n-mail: käsku ei ole
dl10n-mail: không tìm thấy lệnh
dl10n-mail: komanda nerasta
dl10n-mail: Kommando nicht gefunden.
dl10n-mail: kommandot finns inte
dl10n-mail: komut yok
dl10n-mail: nie znaleziono polecenia
dl10n-mail: níor aimsíodh an t-ordú
dl10n-mail: no se encontró la orden
dl10n-mail: no s'ha trobat l'ordre
dl10n-mail: opdracht niet gevonden
dl10n-mail: parancs nem található
dl10n-mail: perintah tidak ditemukan
dl10n-mail: príkaz nenájdený
dl10n-mail: příkaz nenalezen
dl10n-mail: команда не найдена
dl10n-mail: командата не е открита
dl10n-mail: 命令找不到
dl10n-mail: コマンドが見つかりません