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- # [DUL: Block Dialup Users]
- #
- # Description: "Whether to use the MAPS DUL list to block dialup accounts from connecting directly to you."
- # Keywords: "MAPS, RBL, Realtime Blackhole List, ORBS, mail relay, ban, blackhole, rejection methods, DUL, dialup, modem, ppp"
- # Category: "Junk mail detection"
- # Format: "{TRUE OR FALSE}"
- #
- # The MAPS Dialup User List, or DUL, is a blacklist of TCP/IP addresses
- # used by ISP's for dialup accounts.
- #
- # Almost all email for dialup accounts is sent through the ISP's mail
- # servers, provided by the ISP for that purpose. However, people sending
- # large quantities of junk mail do not always like to use their ISP's mail
- # servers, because the ISP can notice the junk mail and disconnect their
- # account.
- #
- # For this reason, the latest spam-sending programs send email directly
- # from a dialup account to your server. Since legitimate mail is
- # very rarely sent this way (directly from a dialup account), the DUL
- # attempts to list all the TCP/IP addresses used by dialup accounts
- # in order to refuse email being sent directly from those TCP/IP
- # addresses. Of course, even if the DUL is activated, people with
- # dialup accounts can still send email to you, but they will do it
- # by sending their email through their ISP, which is how the vast
- # majority of dialup-account authored email is sent.
- #
- # The MAPS DUL has a low false false-positive rate because so few
- # people send email directly from dialup accounts. It is an effective
- # way to block spam from these direct-sending kind of spam-sending
- # programs.
- #
- # For more information about the MAPS DUL, see http://maps.vix.com/dul
- #
- # By default, this setting is disabled.
- #
- # Instructions: "Please enter the word TRUE or the word FALSE below."
- FALSE
-