On 05/26/2010 08:17 AM, Steve Atkins wrote: > > On May 26, 2010, at 8:09 AM, Michael Thomas wrote: > >> On 05/26/2010 07:48 AM, Steve Atkins wrote: >>>>> Perhaps I missed something, but if domain B is rejecting email from the >>>>> list Authored by A, then won't that cause a list member at domain B to be >>>>> removed from the list as well? I think that is what John meant by >>>>> innocent bystander. Most MLM remove subscribers after repeated bounces. I >>>>> don't know if they are smart enough to look into why the message bounced. >>> >>> That's exactly the issue, and not a theoretical one. >>> >>> However, domain B is not an innocent bystander, as they intentionally >>> configured their mail system to reject mail it shouldn't, and the >>> recipients at domain B support that decision, on some level. >> >> Wait a minute. There's nothing wrong with discarding something set to >> discardable (cf, "shouldn't"). > > Yup. They didn't do that, though. > >> Or are you saying that it shouldn't produce a bounce/5xx and just silently >> discard it? > > Exactly. > > If they would otherwise deliver the mail, and the reason they decided not to > was because of a combination of an ADSP-discardable record and the lack of a > DKIM signature then they should silently discard the mail.
I don't think that we've ever come to any consensus on whether it should be silently discarded or not. I can see reasons for both arguments, but given that we've also talked about fbl reports back to the discardable domain that seems rather circuitous in the non-list case. Mike _______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html
