makeacceptmailfor: 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/makeacceptmailfor - from package: courier-mta

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

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