perdition.managesieve: 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/perdition.managesieve - from package: perdition

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

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