By Guido Schryen
This publication examines anti-spam measures by way of their potentials, boundaries, benefits, and downsides. those elements confirm to which quantity the measures can give a contribution to the relief of junk mail in the end. It examines legislative, organizational, behavioral, and technological anti-spam measures, together with an perception into their effectiveness. moreover, it provides the conceptual improvement and research of an infrastructural electronic mail framework, which gains one of these complementary software, and considers deployment issues.
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Extra resources for Anti-spam measures : analysis and design
Although SMTP allows the use of “message submission”, SMTP-AUTH and some more security procedures like SMTP after POP, these extensions are mostly restricted to the dialog between the user’s e-mail client and an SMTP server (SMTP-AUTH is an exception to this). 2 SMTP’s susceptibility to spam 39 Fig. 6: Example of (part of) a spoofed e-mail header limitations include low ﬂexibility and a low security level, because user passwords stored on their computers do not seem to be very eﬀective in today’s security environment.
1 The e-mail delivery process 33 Each SMTP e-mail transaction basically consists of three steps: The transaction starts with a MAIL FROM command which provides sender identiﬁcation. A series of one or more RCPT TO commands follows, providing receiver information. Subsequently, a DATA command initiates transfer of the e-mail data. 1. The ﬁrst step in the procedure is the MAIL FROM command with a reverse-path as mandatory argument and a parameter list as optional argument. This command tells the SMTP receiver that a new e-mail transaction is starting and that it has to reset its state tables and buﬀers, including any recipients or mail data.
1. The ﬁrst step in the procedure is the MAIL FROM command with a reverse-path as mandatory argument and a parameter list as optional argument. This command tells the SMTP receiver that a new e-mail transaction is starting and that it has to reset its state tables and buﬀers, including any recipients or mail data. The reverse-path contains the source mailbox, which can be used to report errors. The optional list of parameters is associated with negotiated SMTP service extensions. The SMTP client needs to repeat sending the MAIL FROM command until it is accepted by the SMTP server returning a 250 OK reply.
Anti-spam measures : analysis and design by Guido Schryen