By Guido Schryen
This ebook examines anti-spam measures by way of their potentials, barriers, merits, and disadvantages. those elements ascertain to which volume the measures can give a contribution to the relief of unsolicited mail ultimately. It examines legislative, organizational, behavioral, and technological anti-spam measures, together with an perception into their effectiveness. additionally, it provides the conceptual improvement and research of an infrastructural electronic mail framework, which gains one of these complementary program, and considers deployment issues.
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Extra info for Anti-Spam Measures: Analysis and Design
To analyze the impact of spam on employee productivity, Nucleus  conducted interviews with employees and IT administrators at diﬀerent US companies to learn about their experiences with spam. 5 minutes. 5 minutes/day divided by 480 total minutes/day). 4% times 2080 hours at an average fully loaded cost of USD 30/hour). 4 Economic harm 25 Staﬀ costs Spam-related staﬀ is needed in many regards. First, IT employees have to maintain the anti-spam infrastructure. This comprises, for example, the maintenance of anti-spam software, blacklists and whitelists and the integration of new hardware.
Infrastructure costs Spam e-mails burden the IT infrastructure of Organizations, especially ESPs and ISPs, in many ways: anti-spam software and probably hardware are acquired and maintained, processing power for the anti-spam software is needed, bandwidth is consumed, and storage for the spam e-mails must be provided. Assumed that one 500 KB message (with a virus attached) is sent to 10,000 users with their mailboxes at one ESP host, that means an unsolicited, unexpected, storage of 5 GB. A “state of the art” 80 GB disk can take 16 such message ﬂoods before it is ﬁlled.
Changing the content of existing Received entries to make sure they “make sense” when passing an e-mail gateway of some kind most often destroys and deletes information needed to make a message traceable. Care must be taken to preserve the information in Received entries, either in the message itself, the e-mail that the receiver gets, or if that is impossible, in log ﬁles. Even if all these recommendations for traceability and accountability are followed, they do not eﬀectively address the speciﬁc scenario where spam is sent out from infected computers of innocent users.