I have notes of the following changes for freeBSD, not sure if it applies to any other o/s
The following setting will allow the Postfix processes to open huge numbers of files. Edit your loader.conf and add the following: /boot/loader.conf kern.ipc.maxsockets="5000" kern.ipc.nmbclusters="65536" kern.maxproc="2048" kern.maxfiles="16384" kern.maxfilesperproc="14745" Sendmail specific settings to the default rc.conf and periodic.conf. Edit your rc.conf and add the following: /etc/rc.conf sendmail_enable="YES" sendmail_flags="-bd" sendmail_outbound_enable="NO" sendmail_submit_enable="NO" sendmail_msp_queue_enable="NO" Edit or create your periodic.conf to have the following: /etc/periodic.conf daily_status_mail_rejects_enable="NO" daily_status_include_submit_mailq="NO" daily_submit_queuerun="NO"
