mlmmj-recieve: 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 CentOS possible default full paths are:

/usr/bin/mlmmj-recieve - from package: mlmmj

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/mlmmj-recieve - from package: mlmmj

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

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