See spam before erasing ?

==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.2
- Linux/BSD distribution name and version: Debian 8
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): Mysql
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? No
- Related log if you're reporting an issue:
====

Hi,

I am not using the Pro version of iRedAdmin ...
How is it possible for me to see spams before they are erase by the system's script ?
Is there any free tools ofr this ?

thx