I'm running Zimbra 4.5.6_GA_1044 on a Mac OS X server.

Everything is fine, except I had a server freeze the other day when it ran out of disk space. Looking around I see that Zimbra has filled up /var/tmp with 61GB of data!:

zimbra$ du -h -d0 /var/tmp/
 61G    /var/tmp/
Looking in /var/tmp, I see loads of entries like:

drwx------   11 zimbra  wheel  374 Nov 20 20:03 clamav-ff417d6bdad399986cce8869614861d8
Inside of which is:

zimbra$ ls -l /var/tmp/clamav-ff417d6bdad399986cce8869614861d8/
total 42624
-rw-rw-rw-   1 zimbra  wheel     17992 Nov 20 20:03 COPYING
-rw-rw-rw-   1 zimbra  wheel   4736103 Nov 20 20:03 main.db
-rw-rw-rw-   1 zimbra  wheel      3083 Nov 20 20:03 main.fp
-rw-rw-rw-   1 zimbra  wheel    640977 Nov 20 20:03 main.hdb
-rw-rw-rw-   1 zimbra  wheel       318 Nov 20 20:03 main.info
-rw-rw-rw-   1 zimbra  wheel   2333904 Nov 20 20:03 main.mdb
-rw-rw-rw-   1 zimbra  wheel  14072345 Nov 20 20:03 main.ndb
-rw-rw-rw-   1 zimbra  wheel       217 Nov 20 20:03 main.zmd
Should these files not be deleted on a regular basis? Is there a cron job I should be adding? I've looked around on the forum but don't see anything relevant.

Thanks in advance,