Steven, the 'Generic server queue TCPIP$SMTP' is being defined and started by @SYS$STARTUP:TCPIP$SMTP_STARTUP In a cluster with a common queue database, those generic TCPIP$SMTP_node_nn queues may be created for each node, depending on the setting of Number-Of-Queues-Per-Node : ... in TCPIP$SMTP_COMMON:TCPIP$SMTP.CONF Volker.