Hello, Graeme Fowler writes:
> Getting back to the OP's question, and your answer: Dynastop isn't doing > TXT lookups, because it's doing a different thing entirely. It might > reduce the number of TXT lookups for a given query, but that's because > it isn't doing DNS lookups at all. Correct, there are no TXT lookups. DynaStop does a single realtime A ptr lookup. The result is stored in a memory cache until expired. Depending upon how active an IP address is, it may easily have several hundred hits from the cache as opposed to DNS lookups.. On a clustered mail server with multi DynaStop clients, one single lookup thoughout the entire cluster can be translated into a significant savings in resources and bandwith shared across the entire cluster. On a single non-clustered system, there will be a still savings as DynaStop's cache will most likely outlive Exim's cache, depending on how active the IP address is. --- DynaStop: Stopping spam one dynamic IP address at a time. http://tanaya.net/DynaStop/ -- ## List details at http://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/
