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Re: Time to check the rate limits on your mail servers
On Thu, 3 Feb 2005, Michael Loftis wrote:
--On Thursday, February 03, 2005 11:42 +0000 [email protected] wrote:I disagree.
On a per IP basis, sendmail now offers
ClientRate, number of connections allowed within a 60 second sliding window from a given IP
ClientConn, number of active connections allowed from an IP at any time
Used 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.