faxmail: 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/faxmail - from package: hylafax+-client

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

On Debian possible default full paths are:

/usr/bin/faxmail - from package: hylafax-client

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

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