1. Yes. It's per server.
2. No. Only cleans out the HAM/SPAM accounts.
To set/adjust the junk folder cleanout dates/cronjob, from the admin gui go to "Class of Service", pick the class of service you use for your users, then click on "Advanced" and under "Spam message lifetime:" slot, assign a new number.
I am using 3.14 so may be a bit different for 4.xx but that's where you would change this anyway.
3. No idea as I don't run this yet. Am looking to test 4.04 this weekend though.
Hope this helps.
:-)
Scotty |