[Mimedefang] Problem with load from same host.

[Alton Yu]

System is Sunblade 100, 256MB ram, Solaris 8, Sendmail 8.12.11, Mimedefang
2.42, Spamassassin 2.42 and ClamAV 0.68.

Problem is that if it gets too many messages at once (maybe over 5), it
starts choking. Some logging is below.
Here's my configuration:
/etc/init.d/mimedefang:
MX_MINIMUM=2
MX_MAXIMUM=20

/usr/lib/mail/cf/sendmail.mc:
INPUT_MAIL_FILTER(`mimedefang',
`S=unix:/var/spool/MIMEDefang/mimedefang.sock, F=T, T=S:10m;R:10m;E:5m')

/var/spool/MIMEDefang is on tmpfs:
/var/spool/MIMEDefang on swap read/write/setuid/size=300m/dev=3 on Mon Apr
28 15:25:20 2003

Please let me know what tweaking I should be doing.

TIA!
Alton

Gets something like this:
Apr 11 10:20:55 wuhan mimedefang-multiplexor: [ID 778059 mail.info] Starting
slave 5 (pid 3940) (6 running): About to execute command 'relayok
63.193.211.135 adsl-63-193-211-135.dsl.snfc21.pacbell.net
kitana.shocknetwork.com /var/spool'

Often gets:
Apr 11 10:29:10 wuhan mimedefang-multiplexor: [ID 778059 mail.info] Starting
slave 15 (pid 4019) (20 running): About to execute command 'relayok
63.193.211.135 adsl-63-193-211-135.dsl.snfc21.pacbell.net
kitana.shocknetwork.com /var/spool'
Apr 11 10:29:26 wuhan mimedefang[3902]: [ID 627436 mail.warning] mfconnect:
No free slaves