Hello,
Adam Roach posted a message to an IETF mailing list about bounces for
some messages with DKIM signatures. Messages posted to the IETF
mailing lists will have their DKIM signatures invalidated as a tag is
added to the subject line and a message footer appended to the
message body. An invalidated DKIM signature generally doesn't cause
mail delivery issues. However, if the domain in the From: header
field advertises an ADSP policy of "all" or discardable", there is a
risk that some receivers subscribed to the mailing lists might reject
or discard the message.
It's up to the author of the message to see whether it is worthwhile
to use a less restrictive ADSP policy for the domain used to post to
mailing lists. Receivers might also want to take corrective action
at their end if they believe that it is not appropriate to reject,
bounce or discard valid messages.
Regards,
-sm
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