axgetmail: 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/axgetmail - from package: ax25mail-utils

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