Are you telling us that mailing lists do not make the difference between a
hard bounce or a soft bounce? This seems like a bug to me.
Um, you might want to read the DMARC spec.
15.8. Rejecting Messages
This proposal calls for rejection of a message during the SMTP
session under certain circumstances. This is typically done in one
of two ways:
o Full rejection, wherein the SMTP server issues a 5xy reply code
(550 SHOULD be used) as an indication to the SMTP client that the
transaction failed; the SMTP client is then responsible for
generating notification that delivery failed (see Section 4.2.5 of
[SMTP]).
o A "silent discard", wherein the SMTP server returns a 2xy reply
code implying to the client that delivery (or, at least, relay)
was successfully completed, but then simply discarding the message
with no further action.
Do you ssee a soft bounce in there? I suppose the silent discard is
relatively harmless, but if your mail is going to be thrown away anyway,
why bother to send it?
Now, more factual, I read this doc
(http://www.esosoft.com/support/mailinglist/mailman/bounce.html) a few
weeks ago, and mailman seems to consider as a hard bounce, any bounce it
does not recognize, this seems to me poor design.
If you want to tell the people who maintain Mailman that their software,
which works just fine in a bazillion installations, has to change because
of our latest FUSSP, well, try it and let us know how it goes.
Really, if you want to participate in mailing lists, it's your
responsibility to do so in a way that doesn't screw up the lists for
everyone else. If I found people bouncing off my lists due to subscribers
who publish overstrict DMARC policies, the solution is to remove the
offending subscribers from the list. I don't think my position would be
unusual.
R's,
John
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