Kyle Hasselbacher <[EMAIL PROTECTED]> writes:

> Is there a good way to detect some of these otherwise normal-looking
> auto-responses?  It's nice that TMDA blocks them for me, but it
> would be even nicer if I could avoid challenging them.

I'm not crystal clear on what you are asking, so feel free to
reiterate if I've missed your point.

TMDA attempts to detect machine generated messages (bounces,
auto-responses, vacation messages, etc) and if it does so, it will not
respond to the message (essentially a HOLD of the message in pending).

There is no standard available to govern the characteristics of
machine generated messages, so TMDA uses a set of heuristics.  For
more details, see autorespond_to_sender() in tmda-rfilter, but
basically TMDA will not respond if any of the following conditions are
met:

* The envelope sender address of the message is '<>', '[EMAIL PROTECTED]', or begins
  with 'mailer-daemon' or 'majordomo'.

* The message has an 'Auto-Submitted' header field whose value is
  either 'auto-generated' or 'auto-replied'.

* The message has any of the following mailing list header fields:
  'List-Id', 'List-Help', 'List-Subscribe', 'List-Unsubscribe',
  'List-Post', 'List-Owner', 'List-Archive', 'Mailing-List',
  'X-Mailing-List', 'X-ML-Name', 'X-List'.

* The message has a 'Precedence' header field whose value is 'junk',
  'bulk', or 'list'.

This sequence will catch the machine generated messages from most
MTAs, the Unix vacation program, many auto-responders and C/R systems,
and the following mailing list managers:

  Communigate pro, ecartis, ezmlm, fml, listar, listbox.com, listguru,
  listproc, lyris, mailman, majordomo, minimalist, smartlist, sympa,
  topica, yahoogroups.

I'm not aware of any further tests that can be done, but let me know if
you think of one.

Some auto-responders leave absolutely no indication whatsoever that
they are machine generated messages (i.e, Microsoft), and so TMDA has
no way to detect and trap these.  

-- 
By endurance we conquer.
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