refile: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/bin/mu-mh/refile - from package: mailutils-mh
/usr/bin/mh/refile - from package: nmh

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