ran out of disk space, mails caught in kolabmailboxfilter processes

[Gavin McCullagh]

Hi,

we ran out of disk space for a short while today on our /kolab/var
partition.  Needless to say, this blocked mail from being delivered.

Having recovered, we have a bunch of mails stuck

kolab-n  30959  0.0  0.1  70924  8920 ?        Ss   10:55   0:00 /kolab/bin/php -c /kolab/etc/apache/php.ini -f /kolab/bin/kolabmailboxfilter -- --host=xxxxxxxxxxxxxxx --xxxxxxxx at yyyyyyyy --xxxxxxxx at yyyyyyyy --client=127.0.0.1 --config=/kolab/etc/kolab/kolabfilter.conf
kolab-n  31284  0.0  0.1  70924  8924 ?        Ss   10:55   0:00 /kolab/bin/php -c /kolab/etc/apache/php.ini -f /kolab/bin/kolabmailboxfilter -- --host=xxxxxxxxxxxxxxx --xxxxxxxx at yyyyyyyy --xxxxxxxx at yyyyyyyy --client=127.0.0.1 --config=/kolab/etc/kolab/kolabfilter.conf
kolab-n  31370  0.0  0.1  70924  8924 ?        Ss   10:58   0:00 /kolab/bin/php -c /kolab/etc/apache/php.ini -f /kolab/bin/kolabmailboxfilter -- --host=xxxxxxxxxxxxxxx --xxxxxxxx at yyyyyyyy --xxxxxxxx at yyyyyyyy --client=127.0.0.1 --config=/kolab/etc/kolab/kolabfilter.conf
kolab-n  31611  0.0  0.1  70924  8916 ?        Ss   10:55   0:00 /kolab/bin/php -c /kolab/etc/apache/php.ini -f /kolab/bin/kolabmailboxfilter -- --host=xxxxxxxxxxxxxxx --xxxxxxxx at yyyyyyyy --xxxxxxxx at yyyyyyyy --client=127.0.0.1 --config=/kolab/etc/kolab/kolabfilter.conf

Does anyone know a way to signal these to retry or inject the emails back into
the mail queue?  There are also a bunch of mails like these in /tmp:

-rw-------  1 kolab-n kolab-n    17225 2011-06-09 10:57 IN.Horde_Kolab_Filter_Incoming.qnESEa
-rw-------  1 kolab-n kolab-n    12963 2011-06-09 10:41 IN.Horde_Kolab_Filter_Incoming.qQHDon
-rw-------  1 kolab-n kolab-n   563981 2011-06-09 10:50 IN.Horde_Kolab_Filter_Incoming.qZIJfa
-rw-------  1 kolab-n kolab-n     5898 2011-06-09 10:40 IN.Horde_Kolab_Filter_Incoming.R8i7zu
-rw-------  1 kolab-n kolab-n     1173 2011-06-09 10:59 IN.Horde_Kolab_Filter_Incoming.riIbYI
-rw-------  1 kolab-n kolab-n     2329 2011-06-09 10:55 IN.Horde_Kolab_Filter_Incoming.RRol9I
-rw-------  1 kolab-n kolab-n     9200 2011-06-09 10:41 IN.Horde_Kolab_Filter_Incoming.S3t0Ft

These data files appear to be those for the processes.  Is that right?

Thanks in advance for any hints.
Gavin