nanog mailing list archives
Re: Time to check the rate limits on your mail servers
From: "Sam Hayes Merritt, III" <sam () themerritts org>
Date: Fri, 4 Feb 2005 10:46:04 -0600 (CST)
On Thu, 3 Feb 2005, Michael Loftis wrote:
--On Thursday, February 03, 2005 11:42 +0000 Michael.Dillon () radianz com wrote:Do you let your customers send an unlimited number of emails per day? Per hour? Per minute? If so, then why?Because there are *NO* packages available that offer limiting. Free or commercial.
I disagree. On a per IP basis, sendmail now offersClientRate, number of connections allowed within a 60 second sliding window from a given IP
and ClientConn, number of active connections allowed from an IP at any timeUsed in conjunction with Jochen Bern's bm patch available from http://www.informatik.uni-trier.de/~bern/sendmail/ which limits the number of mail commands given in a single connection, you can rate limit your users fairly well. We have used these limits for ~6 months now and have only had to whitelist 3 sites from the Client limits.
You could probably adjust the window size for the ClientRate and then limit the number of smtp commands per connection to achieve like an hourly limit of some sort.
sam
Current thread:
- Re: Time to check the rate limits on your mail servers, (continued)
- Re: Time to check the rate limits on your mail servers Edward B. Dreger (Feb 03)
- Re: Time to check the rate limits on your mail servers Nanog List (Feb 03)
- Re: Time to check the rate limits on your mail servers Edward B. Dreger (Feb 03)
- Re: Time to check the rate limits on your mail servers Michael Loftis (Feb 03)
- Re: Time to check the rate limits on your mail servers Robert Blayzor (Feb 03)
- Re: Time to check the rate limits on your mail servers Chris Adams (Feb 03)
- Re: Time to check the rate limits on your mail servers Robert Blayzor (Feb 03)
- Re: Time to check the rate limits on your mail servers Robert Blayzor (Feb 03)
- Re: Time to check the rate limits on your mail servers Peter Corlett (Feb 03)
- Re: Time to check the rate limits on your mail servers Peter Corlett (Feb 03)
- Re: Time to check the rate limits on your mail servers Bob Martin (Feb 03)
- Re: Time to check the rate limits on your mail servers Sam Hayes Merritt, III (Feb 04)
- RE: Time to check the rate limits on your mail servers Joel Perez (Feb 03)
- RE: Time to check the rate limits on your mail servers Raymond Dijkxhoorn (Feb 03)
- Re: Time to check the rate limits on your mail servers Gadi Evron (Feb 03)
- Re: Time to check the rate limits on your mail servers Raymond Dijkxhoorn (Feb 03)
- Re: Time to check the rate limits on your mail servers Gadi Evron (Feb 03)
- Re: Time to check the rate limits on your mail servers Lou Katz (Feb 03)
- RE: Time to check the rate limits on your mail servers Raymond Dijkxhoorn (Feb 03)
- Re: Time to check the rate limits on your mail servers Valdis . Kletnieks (Feb 03)
- Re: Time to check the rate limits on your mail servers Steven Champeon (Feb 03)