I decided to use my RedHat 9 web server as an email server as well. I set up sendmail, outgoing mail worked ok but incoming would not come through. I fixed that problem by looking at a tutorial.
Now that incoming mail gets through and works I cannot make outgoing mail get past the mail queue. I had a look in the mail log file and found the following errors:
... unalble to write /var/run/sm-client.pid: Permission Denied
and NOQUEUE: SYSERR(UID41): can not chdir(/var/spool/mqueue/): Permission Denied. I think that is why out going mail does not work.
Can anyone help?