Mass Mailout Performance Tips

[simon . elder]

Hi, 

Does anyone have some tips on getting peak performance out of mass 
mailings with qmail.
We regularly send out newsletters to over 500,000 email address's on 
a weekly/fortnightly basis.
I've looked through the archives and there are some excellent tips 
but I'm still hoping to push it further as a full mailout takes 
nearly a day.

My Current  


Regards,


Simon E.