Getting the most out of Qmail?

[Rick]

Hello;     I recently installed Qmail on a dedicated server.... I want to use qmail to send out email to my double optin list.... (no spam here)  I compiled qmail with 200 concurrent connections and also created the nessecary control files...  But it still took 3-4 hours to email my 48,000 members.... Is this normal, or is there any tricks to push out more???   Thank you!   -Rick Findaroo.com