Name: draft-stumpf-dns-mtamark-03
Title: Marking Mail Transfer Agents in reverse DNS with TXT RRs
State: Active
Authors: Markus Stumpf
Group: Individual Submissions (none)
Date: 2004-10-21
In contrast to other more extensive approaches to deal with unsolicited
email, commonly called "spam", this memo discusses a very simple
authentication scheme. It uses marking of hosts in reverse DNS
(IN-ADDR.ARPA and IP6.ARPA zones) to allow the receiving mail transfer
agents to decide whether the connecting (sending) host is a designated mail
transfer agent (MTA) or not. Despite being a weaker scheme than most of the
other proposals currently discussed, it can reduce the amount of spam and
viruses/ worms significantly and has the advantage that it can be
implemented based on existing and well-established Internet technology like
DNS without any changes to that technology.
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