Email backlog growing.

[sebas]

There is a problem with the server, the email backlog is growing and the mail is not being delivered.

Mon Feb 18 13:37:03 CST 2013
Total messages: 1551
Messages with local recipients: 328
Messages with remote recipients: 45
Messages with bounces: 8
Messages in preprocess: 1176

Mon Feb 18 13:54:01 CST 2013
Total messages: 1754
Messages with local recipients: 428
Messages with remote recipients: 70
Messages with bounces: 6
Messages in preprocess: 1260

[root@www psa]# w
13:54:12 up 22 min, 1 user, load average: 3.41, 4.02, 3.09
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
sebas pts/1 s01060023bee9140 13:35 0.00s 0.24s 0.02s sshd: sebas [priv]


The server is not overloaded and SMTP (QMail), IMAP/POP3 (Courier-IMAP), SpamAssassin are all running without problem.

Any ideas? Is there a way to kick out all that mail?

I have tried

qmHandle -a

But it is not working.

Thanks for your help.

Update:
I found that there is something strange with the handlers:

Feb 18 15:28:48 www qmail-queue-handlers[24410]: handlers_stderr: SKIP
Feb 18 15:28:48 www qmail-queue-handlers[24410]: SKIP during call 'check-quota' handler
Feb 18 15:28:48 www qmail-queue-handlers[24410]: starter: submitter[24412] exited normally

It is the same with everymail.

But there is space on the harddrive:

[root@www ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 9.9G 6.0G 3.5G 64% /
tmpfs 3.9G 0 3.9G 0% /dev/shm
/dev/sda1 99M 55M 39M 59% /boot
/dev/sda5 219G 138G 70G 67% /var
/dev/sdb1 231G 58G 162G 27% /var/www

I would like to disable the email quota handler, but I don??t know how.

OK, I managed to remove the quota with:

/usr/local/psa/admin/bin/mail_handlers_control --remove --name=check-quota --type=global --queue=before-queue