Ah, that makes sense.
So does funning DHs junk filtering interfere with the normal operation of procmail on an account? For my primary email account (which is also a shell account) I want to run (am running) procmail, but if the junk filtering uses a different mail server perhaps that also means I cannot use procmail?
Finally, it looks to me like it is impossible to use procmail on a catch-all address (since procmail only works for shell account, and a catch-all cannot be a shell account, right?), but can junk filtering at least be enabled for catch-all accounts?
Thanks for your patience with these newbie questions... I am very familiar with procmail (it was the only available way to multiplex email addresses at my last ISP), but not DHs mail sequence and infrastructure...