-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 In message <[EMAIL PROTECTED]>, Matt Fretwell <[EMAIL PROTECTED]> writes
> If I remember correctly, someone once posted a paper correlating the >volume sent with regards to invalid recipients and recipients per message, >and also to the general usage patterns seen from each client. It was >literally a three to four pronged approach, working on cumulative data by >building the info from the logs. there are indeed people working on this sort of idea, eg: S. J. Stolfo, S. Hershkop, K. Wang, O. Nimeskern and C. Hu: A Behavior Based Approach to Securing Email Systems, Proceedings Mathematical Methods, Models and Architectures for Computer Networks Security (MMMACNS- 2003), LNCS 2776, Springer, 2003, pp. 57--81. http://www1.cs.columbia.edu/ids/publications/EMT-ACNS03.pdf they are also looking at an academic environment and there is the inbuilt assumption that their users won't suddenly start running mailing lists (or inviting all their friends to a birthday party) >( BTW, if I am drifting off topic, let me >know. I have only lightly perused the thread since it started :) it's not a spam-fighting list, but things-that-sysadmins-can-do seem to be tolerated :) a further caution (again the academics may meet this a lot less) is that a great many people seem to be forwarding email these days -- from company accounts to home accounts, or onward to Hotmail for their road- warriors to pick up, or just to their offspring at Uni.. If this forwarded email didn't go through the ISP filtering system (or went through <n> minutes ago, before the latest tweak) then the presence of filters on outgoing email (or better/different filters at the new destination) will cause a delivery failure... and you don't want to get over-excited with a customer who's merely forwarding junk rather than generating it or letting it into the system in the first place - -- richard Richard Clayton They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety. Benjamin Franklin -----BEGIN PGP SIGNATURE----- Version: PGPsdk version 1.7.1 iQA/AwUBQoNudZoAxkTY1oPiEQIFEgCg8lUYOLGVmXx/kMpLSWBY1W3mTBEAoM4g Zaoh7y2/7n/hvgd8BTu6Y5fE =lyl1 -----END PGP SIGNATURE----- -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
