authdaemond: 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/authdaemond - from package: courier-authdaemon

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

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