[KLUG Members] help with lockup problem on debian sarge

[Richard Harding]

The last two days at different times (3am Sun and 6am Mon) my sarge
email server has just gone unresponsive. No video, ssh, anything. For
all purposes the machine is off, but it is still powered. I cannot seem
to find any reason in the logs for it. All appears well and then nothing
reported until a hard reboot. 

I checked and saw that there were courier updates that fixed a potential
DOS. 
http://freshmeat.net/articles/view/1792/

What I am wondering is how I can check to see if this was causing the
problem I'm having. Could these packages I'm running for imap have been
locking up the machine?

I appreciate the help. 

Rick