syslog2eximlog: 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/sbin/syslog2eximlog - from package: exim4-base

You may install the required package with command apt-get install {package}
Error in other languages:
syslog2eximlog: bevel nie gevind nie
syslog2eximlog: comandă negăsită
syslog2eximlog: comando não encontrado
syslog2eximlog: commande introuvable
syslog2eximlog: command not found
syslog2eximlog: käsku ei ole
syslog2eximlog: không tìm thấy lệnh
syslog2eximlog: komanda nerasta
syslog2eximlog: Kommando nicht gefunden.
syslog2eximlog: kommandot finns inte
syslog2eximlog: komut yok
syslog2eximlog: nie znaleziono polecenia
syslog2eximlog: níor aimsíodh an t-ordú
syslog2eximlog: no se encontró la orden
syslog2eximlog: no s'ha trobat l'ordre
syslog2eximlog: opdracht niet gevonden
syslog2eximlog: parancs nem található
syslog2eximlog: perintah tidak ditemukan
syslog2eximlog: príkaz nenájdený
syslog2eximlog: příkaz nenalezen
syslog2eximlog: команда не найдена
syslog2eximlog: командата не е открита
syslog2eximlog: 命令找不到
syslog2eximlog: コマンドが見つかりません