mailtoe: 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/mailtoe - from package: dbacl

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