muttprofile: 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
/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/bin/muttprofile - from package: muttprofile

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