maildist: 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/maildist - from package: mailagent

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

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