speeding up smtp?

[TAG]

Hi,

Does anyone have an idea on how to spead up the smtp side of qmail??

I have tcpserver installed and with the following parameters set - 

tcpserver -R -H -t5 -v -x/etc/tcp.smtp.cdb -u$USERID -g$GROUPID 0 25 

is this where I must look at??

Thanks
Tonino