I am implementing connection rate limiting connections from site-local hosts, some of which have anti-social behavior and use up all of the available IP connection sockets at times. Currently I have inherited a setting of
smtp_connect_backlog = 40 # max number of concurrent SMTP connections smtp_accept_max = 60 # don't attempt immediate delivery when more than 40 connections # in progress (default = 10) smtp_accept_queue = 40 In respect of smtp_accept_max is there some upper limit and, for RH Linux, how do I find out what this may be. There is presumably some Kernel limit, but there are other things to consider too. Is this just something people adjust hubristically or is there a more scientific approach? Same question for smtp_connect_backlog. Do not assume what I have inherited makes any sense. Best Rob This email and any attachments are intended solely for the addressee and may contain confidential information. If you are not the intended recipient of this email and/or its attachments you must not take any action based upon them and you must not copy or show them to anyone. Please send the email back to us and immediately and permanently delete it and its attachments. Where this email is unrelated to the business of University of the Arts London or of any of its group companies the opinions expressed in it are the opinions of the sender and do not necessarily constitute those of University of the Arts London (or the relevant group company). Where the sender's signature indicates that the email is sent on behalf of UAL Short Courses Limited the following also applies: UAL Short Courses Limited is a company registered in England and Wales under company number 02361261. Registered Office: University of the Arts London, 272 High Holborn, London WC1V 7EY -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
