Slightly off-topic ...
I'm on an e-mail list, managed by ezmlm, where it seems both by my own
observations and those on the list, that I receive an inordinate number
of out-of-the-office and unknown-user messages that come directly back
to me any time I post a reply to that list. Worse, these direct replies
don't have anything in the headers, or subject, to tip me off to the
fact that the reply relates to my original posting to the list.
Comparing the headers of that list to those on this list, I note they
both have a Return-Path header, but that this other list has no
Sender or Errors-To header. If we assume that the various vacation
programs and MTA's out there play by a somewhat consistent set of
rules, would the lack of Sender and Errors-To explain the observed
errant behavior? What role do these headers play? Which headers
take precedence over others when it comes to replying? And given
that my note, as transmitted by the list manager has Precedence: bulk,
and various List- header lines, shouldn't the various vacation programs
and mail bouncers no better than to reply directly back to me?
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