Hi, I have setup an ISPConfig 3 server as per: http://www.howtoforge.com/perfect-server-centos-6.0-x86_64-ispconfig-3 Everything is working except receiving emails with attachments. The error message I see is: Sep 28 14:22:24 ispconfig3 maildrop: Unable to create temporary file. Sep 28 14:22:24 ispconfig3 postfix/pipe: 2585740185: to=<firstname.lastname@example.org>, orig_to=<email@example.com>, relay=maildrop, delay=0.02, delays=0.01/0.01/0/0.01, dsn=4.3.0, status=deferred (temporary failure. Command output: /usr/bin/maildrop: Unable to create temporary file. ) From research so far, it seems maildrop writes to temporary files when messages are over a certain size. So, I assume the problem is that reception of emails with attachments results in Maildrop needing to write to a temp file, which it is having problems with. Some background: ls -la /var/tmp/ total 8 drwxrwxrwt. 2 root root 4096 Sep 28 14:22 . drwxr-xr-x. 28 root root 4096 Sep 15 00:30 .. ls -l `which maildrop` -r-sr-sr-x 1 root mail 202224 Sep 14 11:08 /usr/bin/maildrop maildrop -v maildrop 2.5.4 Copyright 1998-2005 Double Precision, Inc. GDBM/DB extensions enabled. Courier Authentication Library extension enabled. Maildir quota extension are now always enabled. This program is distributed under the terms of the GNU General Public License. See COPYING for additional information. As I said before, receiving "small" emails is fine, so I presume all the "routing/filtering" functions are working fine. Everything else (web sites, ftp, etc) also work fine. Appreciate any help.....Graeme.