[Exim] Mass Mailings and Sendmail(exim) process's...

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We have a client here that sends out thousands and thousands of emails a day. Sometimes when i'm in her server i can see 800,000+ emails in queue. She was using qmail and i just bumped up the concurrentprocesses so that 500 remote process's would run. But not we have moved her to a bigger server and this server now runs exim. Her scripts that do the mailings are perl based and they call /usr/sbin/sendmail. I've notifed that /usr/sbin/sendmail is a symbolic link to /usr/sbin/exim. The other day i was logged into her server and she had 500+ /usr/sbin/sendmail process's in the tree. Her load adverage was running up around 400+ and the server was crawling. From what i can tell, to me it looks like it's trying to send the messages right when their sent to /usr/sbin/sendmail rather than putting them in queue and waiting for exim -bd -q1m to run them. Anybody who has any information about what i can do to speed up the mailserver and help reduce load on it would be much appriciated. This server is a p4 1.8 with 1gb DDR and 3 38gb SCSI3 Drives (raid 5). Her old server was a p3 1ghz with 1gb ram running on a 80gb ide drive (she killed a drive about once every 2 months). Whats sucks about all this is that the old server running qmail was sending out mail faster than the new one is. My AIM is OCTekShaun and my email is Shaun.Murphy@???. Thanks.

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