Para verificar a fila eu faço geralmente
# qmailctl stat
-> mi retornando o seguinte.

messages in queue: 1894
messages in queue but not yet preprocessed: 198

#qmHandle
qmHandle v1.2.0
Copyright 1998-2003 Michele Beltrame

Available parameters:
-a : try to send queued messages now (qmail must be running)
-l : list message queues
-L : list local message queue
-R : list remote message queue
-s : show some statistics
-mN : display message number N
-dN : delete message number N
-Stext : delete all messages that have/contain text as Subject
-D : delete all messages in the queue (local and remote)
-V : print program version

Additional (optional) parameters:
-c : display colored output
-N : list message numbers only
(to be used either with -l, -L or -R)

You can view/delete multiple message i.e. -d123 -v456 -d567


Após as 16h 30min começa a ficar a fila de processados em 50 e gradativamente vai aumentando.

O processo do clamd e do spamd estão realmente pesando um pouco.
# top
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3352 spamd 16 0 41392 36m 2872 S 23.0 3.6 1:04.16 spamd
31392 spamd 16 0 34240 29m 2860 R 7.9 2.9 0:14.58 spamd
6266 spamd 16 0 28956 24m 2856 S 6.9 2.4 0:01.27 spamd

5 clamav 15 0 8300 5580 1940 S 5.3 0.5 0:00.16 perl5.8.6
7286 clamav 15 0 8296 5576 1940 S 5.3 0.5 0:00.16 perl5.8.6
1813 clamav 16 0 90688 33m 1384 S 1.7 3.3 74:52.85 clamd


Tem alguma outra forma de corrigir ?
Eu ia postar aqui ainda os processos, mas seria impossível. tem muitos processos do clamav.

clamav 12752 0.0 0.0 2300 1012 ? S 09:47 0:00 sh -c /usr/bin/spamc -c < /var/spool/qmailscan/working/n
clamav 12753 0.0 0.0 2136 592 ? S 09:47 0:00 /usr/bin/spamc -c
clamav 12756 0.0 0.0 2304 1016 ? S 09:47 0:00 sh -c /usr/bin/spamc -c < /var/spool/qmailscan/working/n
clamav 12757 0.0 0.0 2140 612 ? S 09:47 0:00 /usr/bin/spamc -c
clamav 12777 0.0 0.0 2300 1012 ? S 09:47 0:00 sh -c /usr/bin/spamc -c < /var/spool/qmailscan/working/n
clamav 12778 0.0 0.0 2140 588 ? S 09:47 0:00 /usr/bin/spamc -c


Acho que está ai o problema né.
Agradeço qualquer ajuda.