Hello folks... please share your thoughts on tweaking Qmail to perform more fluidly with increased performance and also to help with "potential" mail delivery issues. I have purchased the Qmail manager from 4PSA with hopes of managing things easier, i.e. less command line execution. When I look at the available Qmail settings, I see a LOT of blanks. Are there items in here that may be tweaked "safely." Here is a screen cap of what I am talking about. 4PSA calls this the "improved" settings choice. Also, in the Plesk FAQ area, there is a reference here about adding the "-Rt0" to the "server_args" setting... can this be done in the 4PSA Qmail Manager? I don't see an obvious place to do so. Also, is that even necessary if this Qmail Manager has already altered the config file? Thanks again for your time and assistance!