Problem: The MTA is interacting with the network operating system or hardware in an undesirable way.
Possible Cause: If you just updated the MTA software, you might not have unloaded the agent engine (gwenn4.nlm), resulting in a series of "Loader cannot find public symbol: symbol" errors on the server console.
Action: Unload gwenn4.nlm, then start the MTA, so that the newly installed agent engine is loaded along with it.
Possible Cause: The MTA server is running older software, resulting in TCP_HANDLER errors on the server console.
Action: Make sure you are using the most current TCP/IP stack for NetWare.
Possible Cause: The MTA server is overburdened, resulting in SYN attacks.
Action: Make sure overall server utilization is not to high. Increase the MTA's tolerance for slow connections. See "Adjusting the MTA Wait Intervals for Slow TCP/IP Connections" in "Message Transfer Agent" in the GroupWise 6.5 Administration Guide.