I moved all of our company email accounts to the new ubuntu/virtualmin server last Friday. A lot of spam is getting through. I just enabled greylisting, and I am forwarding spam emails to firstname.lastname@example.org (fictious domain, of course :) I am looking at the directory /var/virtualmin-traps/spam and taking a count of the messages. There are 15 messages from somewhere that date from building the system, all with 0 file size. The emails I have sent to the spamtrap address this morning do not change the directory count. Is there some place else the spamtrap is delivering to?
Also, will I have to manually start baysian filtering/learning? If so, should I wait until there are 200 messages? I am forwarding spam as attachments in groups of 4-5 per forwarded message.