makehosteddomains: 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/makehosteddomains - from package: courier-mta

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

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