EHLO lolucanhazspam happening too often for your tastes?
Have Postfix respond with, "u sent me spam, but i ated it":
smtpd_helo_required = yes
smtpd_delay_reject = no
disable_vrfy_command = yes
smtpd_helo_restrictions = permit_mynetworks, reject_invalid_hostname, reject_unknown_hostname, reject_non_fqdn_hostnameOver the past hour, I've seen this minor config change slay 60% of spam inbound to my personal mailserver.
Remember: Default software configs given to you by your favorite Linux distribution will usually suck. Modify 'em.
