cyrdeliver: 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/cyrdeliver - from package: cyrus-common

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

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