On Mon, Dec 03, 2007 at 10:04:30AM -0700, Joseph L. Casale wrote: > Well, unless you install postfix first, then system-switch-mail, then > execute switch-mail, how does the stuff that needs sendmail know what to use? This is the "alternatives" system at work. /usr/sbin/sendmail is a symlink to /etc/alternatives/sendmail. The "alternatives" system will manage the /etc/alternatives/sendmail symlink, so that if your mail system is configured as "sendmail" then it points to /usr/sbin/sendmail.sendmail which is the _actual_ sendmail command provided by the sendmail RPM package. If your mail system is postfix then it points to /usr/sbin/sendmail.postfix instead. -- rgds Stephen