saslauthd: 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/sbin/saslauthd - from package: cyrus-sasl

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

On Debian possible default full paths are:

/usr/sbin/saslauthd - from package: sasl2-bin

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

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