PPoossttffiixx aanndd LLiinnuuxx ------------------------------------------------------------------------------- BBeerrkkeelleeyy DDBB iissssuueess On RedHat Linux 7.0 you must install the db3-devel RPM before you can compile the Postfix source code. Warning: do not use multiple Berkeley DB versions. Every Postfix program will dump core when it is built with a different Berkeley DB version than the version that is used by the system library routines. See the DB_README file for further information. PPrrooccmmaaiill iissssuueess On RedHat Linux 7.1 pprrooccmmaaiill no longer has permission to write the mail spool directory. Workaround: chmod 1777 /var/spool/mail. SSyyssllooggdd ppeerrffoorrmmaannccee LINUX ssyyssllooggdd uses synchronous writes by default. Because of this, ssyyssllooggdd can actually use more system resources than Postfix. To avoid such badness, disable synchronous mail logfile writes by editing /etc/syslog.conf and by prepending a - to the logfile name: /etc/syslog.conf: mail.* -/var/log/mail.log Send a "kkiillll --HHUUPP" to the ssyyssllooggdd to make the change effective.