Hello, I have two users on our system that can not receive any email. I think it is due to the size of their mailboxes. In both webspace and in mailspace, I have "-1" in it. For the domain they are all "-1" too. This is the email that comes back (edited): Code: This is the mail system at host something.ourdomain.com. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to <postmaster> If you do so, please include this problem report. You can delete your own text from the attached returned message. The mail system <firstname.lastname@example.org> (expanded from <email@example.com>): can't create user output file. Command output: procmail: Error while writing to "/var/mail/clientdomain.com_user" I followed this tutorial: http://www.howtoforge.com/centos-5.1-server-lamp-email-dns-ftp-ispconfig However, I skipped the quota section because I don't want there to be any quotas on stuff. Does anyone have any advise on what could be limiting it? uname -a: Linux something.ourdomain.com 2.6.18-53.1.14.el5 #1 SMP Wed Mar 5 11:36:49 EST 2008 i686 i686 i386 GNU/Linux Code: # df -h Filesystem Size Used Avail Use% Mounted on /dev/md0 224G 11G 202G 6% / tmpfs 498M 0 498M 0% /dev/shm It looks like procmail is version 3.22 Thank you for any help you may provide.