Yakov Shafranovich <research(_at_)solidmatrix(_dot_)com> wrote:
DCC (http://www.rhyolite.com/anti-spam/dcc/) tries to detect bulk emails
as do some other projects. This is not something that requires addition
to SMTP and is an separate protocol.
Let's be aware, though, that many content filtering schemes and
black-lists have been caught adding entries to the list which do NOT
meet the publicly stated criteria.
To put it another way, if you don't know what the criteria are, the
system is oben to abuse by insiders.
Alan Dekok.
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