2.8 Some of my articles are rejected by the server. What does the
error message "437 EMP rejected" mean? There is a program called
"cleanfeed" running on our server. It checks postings for SPAM,
binaries, etc. and rejects the posting if necessary. A typical
characteristic of SPAM is a large number of very similar articles.
cleanfeed tries to identify and block such articles.

If your posting is rejected with the "EMP" (Excessive Multi-Posting)
message, this happens because identical (or very similar) articles
have
been posted - by you or other users - within a certain time span.

This can happen if your internet provider uses dynamic IP numbers and
has given you the same IP number that another customer has just used
while posting via our server. It can also happen with postings that
have
the same content by coincidence (such as test postings). One or more
of
these reasons can be applicable in your specific case.

In most cases a small modification of your posting will solve the
problem - you might need to change the subject.

</q>

It doesn't explain the *inconsistency*, though.