I was hoping you may be able to help me with regards to the above how to article. I followed the how to with no problems and the server has been running fine. Now for some reason all emails stay in /var/spool/postfix/hold directory. The only error i seem to get is in /var/log/user.log MailScanner: Process did not exit cleanly, returned 255 with signal 0 If i run MailScanner --lint it passes on everything. Any help would be very much appreciated.