Date Added: Jan 2011
This paper presents a performance study of the ISP (Internet Service Provider) mail servers. By using the SPECmail2001 benchmark to test a commercial mail service MDaemon 5.0.1, the authors explore the both network and I/O performance of mail servers with user populations between 200 to 10,000. File system traces are also collected for analysis. From the benchmark results, trace-driven simulations and offline trace analysis, they arrive at several important conclusions for the ISP mail servers and give the technical suggestions correspondingly. The authors observed that, in SMTP and POP sessions, the initial network connection setup usually takes the very long time.