uucp-lmtp: 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/sbin/uucp-lmtp - from package: uucp-lmtp

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

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