I have Qmail server on Dell PowerEdge 4300 dual pentium II 450 + 1024 Mb ram.... but why my server unable to fork after 20th days??? I set concurrencyremote and local up to 120.... concurrencysmtp and pop3 set to 100 I already set max file open & max process up to 1024 is my hardware configuration isn't enought to reach 120 concurrency?? is there any formula to set qmail concurrency?? what shuold I do to run Qmail server with long uptime :) thanks before.... -- Arisandy Arief Unit Bisnis Internet - Divre V Jatim Jl. Ketintang 156 Surabaya 60231 Email. [EMAIL PROTECTED]