-----Original Message-----
From: ietf-dkim-bounces(_at_)mipassoc(_dot_)org [mailto:ietf-dkim-
bounces(_at_)mipassoc(_dot_)org] On Behalf Of Scott Kitterman
Sent: Thursday, May 26, 2011 7:07 PM
To: ietf-dkim(_at_)mipassoc(_dot_)org
Subject: Re: [ietf-dkim] MLMs and signatures again
On Thursday, May 26, 2011 03:21:19 PM Steve Atkins wrote:
If the reputation of the MLM is poor enough that mail from it is not
being
delivered, trumping that with an authors reputation may get
individual
emails delivered - but not threads, so it doesn't really improve the
value
provided to the recipient (it probably decreases it - a mailing list
that
delivers one in ten posts to my inbox is less useful than one that
delivers none at all).
I think this has it rather backwards. If mail From (body From) a
certain
domain arrives 999 time with a valid DKIM signature and on the 1,000th
time it
arrives with either no signature or a broken one, then that's a
negative
anomaly in the mail stream that receivers are quite likely to take
notice of.
While ADSP is the public whipping boy for this, there are plenty of
private
efforts based on doing exactly this.
The question isn't do I trust the ML or not. For domains with a non-
trivial
number of users the overall mail system will have no idea about what
ML
should
be trusted or not. The question is how harshly do I treat this
message
based
on the lack of a good signature.
Scott K
The other piece of the equation is how often do I see abusive mail
purporting to be from this domain with no signature while mail from this
domain that is normally signed has no significant problems.
Mike
_______________________________________________
NOTE WELL: This list operates according to
http://mipassoc.org/dkim/ietf-list-rules.html