[Nottingham] outgoing mail queing / RH 8.0

[James Gibbon]

Installed RH 8.0 a couple of weeks ago (thanks again Mike!), and 
have a problem with outgoing mail - it queues up and won't leave
until it's flushed manually (/usr/sbin/sendmail -q as root).

I'm using essentially the same setup as last time I used RedHat 
(7.3) when sending mail 'just worked' - nmh & postfix, but to be
honest have no idea how they interact with sendmail.

I seem to have sendmail running as a daemon:

compaq:/home/jg 23$ ps auxww | grep sendm 
root       685  0.0  2.4  5040 2284 ?        S    17:15   0:00 sendmail: accepting connections
smmsp      695  0.0  2.1  4856 2044 ?        S    17:15   0:00 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue
jg        1178  0.0  0.6  3276  624 pts/0    S    17:34   0:00 grep sendm
compaq:/home/jg 24$ 


I can think of a couple of kludgy workarounds but want to fix it 
properly, so - anyone any idea what I need to fix so that outgoing
mail leaves of its own accord?

Thanks for any help,
James