I have configures the Qmail server (version 1.03/Solaris) to use tcpserver and I have used the following command: /opt/ucspi-tcp-0.84/bin/tcpserver -v -u5001 -g5001 -c500 -x/etc/tcp.smtp.cdb 0 smtp /opt/ucspi-tcp-0.84/bin/recordio /var/qmail/bin/qmail-smtpd 2>&1 | /var/qmail/bin/splogger smtpd 3 & I am sending 5000 messages at it at a rate of ~50 messages a second. I have set the localconcurrency to 100. The problem is that my client is losing connections, almost out of the gate. The client tries to connect to the qmail-smtpd and waits 20 seconds and is failing about 15% of the time. I understand that the SMTP spec calls for the sending server to retry again in a moment and then spread the time out as it continues to fail. However, I am just wondering why the server cannot handle the connections given the fact that I am telling the tcpserver to spawn away as needed. Thanks, David
