"process (ns-proxy) is critical"
Configured Netscape Proxy Server 3.52 as reverse proxy controlling webmail. Currently experiencing problems with the ns-proxy process which appears to "stop" (not hang) leaving all child processes defunct. Users cannot connect or continue a current session.
[271 byte] By [
708282] at [2007-11-25 7:10:34]

Hello
You provide very little information on this problem.
There should be something in your log files. Also, check for core files made by proxy.
BTW, do you really need a reverse proxy? Why don't you install webmail in your DMZ and route all your accesses via that machine?