--On Tuesday, 23 March, 2004 08:48 -0700 Vernon Schryver
<vjs(_at_)calcite(_dot_)rhyolite(_dot_)com> wrote:
Perhaps it would be enough to say just that, along the lines of
... mail directly from the IP addresses of customers of X
instead of via MTAs run by service providers is rejected by
much of the rest of the Internet because it is almost
certainly "spam" or otherwise objectionable. The terms of
service of X usually require the use of MTAs operated by the
service provider and prohibit the operation of MTAs at the
customers' IP addresses. Practically all legitimate mail
from users of X use their service providers' MTAs. Some
service providers use technical mechanisms such as "port 25
filtering" to enforce their terms of service that require
that their customers' mail use the providers' MTAs.
("X" because I'm not sure about factoring that text into
each of the 1st three descriptions or having it one place.)
However, the above statement just isn't true unless the
collection of terms and conditions I've seen are a very odd
subset. "You will not run a server" is typical. "You are
required to use ours" is much less common, and is often
associated with a commercial motive, e.g., "you are required to
use ours, and our domain on your outgoing mail, unless you pay
us more money".
john