Pop3 before Smtp

[Baltazar Quinterno]

Hey, Im using Qmail v.1.03 +Mysql Patch.

I like to know about your experience in using Pop before
SMTP as Spam bloking solution, and if it was 
successfull where do I find some info on implementing it.

Thanks in advance.
-- 

        Baltazar Quintenro
        Internet Argentina
    http://www.interar.com.ar