Manral; Well first the MTA has little to do with the concurrency of the POP server. I can speak to some of this working here at Sendmail, and yes we of course test Postfix to compare. So, in general terms Postfix is quite capable to do 30+ messages a second in a standard config with SCSI drives that are modern, meaning 10k RPM, with an SSD and ReiserFS we have pushed that to over 100, on Sendmail and Postfix. Specific to your question on POP we typicall use so called "profiles" that meet ISP and Corporate work loads. An ISP is on average (from our customer base) about ~+/- 10% concurrency, and this is mostly POP. So what we mean here is when we test we load up x amount of mailboxes with 25 messages and hit them over a 24 hour period like a ISP would have folks logging in POP once then 5-20 minutes (before they log out) POP again. All this is on curves, the avg message size, POP intervals etc. We also stress the system with inbound SMTP or LMTP loads for delivery. Currently I can tell you a Compaq DL380 (Your 370 is similar) running SuSE SLES 2.4.18 with ReiserFS and attached Fiber Channel can handle 125,000 users, with 12,500 concurrent connections. Your bandwidth and your Disc Drives will be the only issues I see, 700 users with 70 Concurrent is a walk in the park if you have sufficient connectivity and I/O. SuSE E-mail Server should be fine, as a rule of thumb in light of the tests on the Sendmail SAMS IMAP/POP server and our MTA. Now IMAP use will be totally different as connections stay open and the profile calls for more like 40% conncurrency in the corp world. Regards, Jon ----- Original Message ----- From: Manral To: suse-linux-e@suse.com Sent: Friday, March 29, 2002 12:04 AM Subject: [SLE] working of mail server Dear friends !!! Is suse E mail server II with post fix as MTA good enough to handle 700 Pop 3 users on a ML370 G2 Dual cpu PIII server with 760 MB of ram on a local lan network. suppose 1/4th of the users log in at a particular instance how does the email server take care that all of them have a fail proofconnection .I would like to understand the mechanism behind the working or handling of requests by an MTA. any suggestions would be a great help . what are the parameters that effect the performance of a mail server i have 128 Kb Bandwidth . Regards Raj ------------------------------------------------------------------------------ -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the archives at http://lists.suse.com