>> That seems sensible to me. So lists should not forward email that they're >> about to render 'discardable' by breaking the signature. Instead, they >> should reject (5xx) or bounce (DSN) the message. Presumably, a bank wants >> to know if it has a bad email address for a customer. > > Yep. > >> Of course, if you >> aren't going to break the signature, or are rewriting the From: address, >> then it's OK to forward the email. > > Probably.
Hm. It's been suggested (often) that a major use case for "discardable" is a bank sending a bank statement, or the like. Going by what's said above, if the bank somehow gets a mailing list address instead of my correct email address, it will behave this way (slightly oversimplifying to make a point; please bear with that, because this is a valid example): - If the mailing list is configured to prepend "[Listname]" to the subject lines, then it will reject the message, and the bank will know there's a problem. - If the mailing list is NOT configured to change the subject lines, then it will accept and forward the message. The bank will not know there's a problem, and my bank statement will be forwarded to the whole mailing list. It seems wrong that the behaviour with an ADSP-compliant mailing list should depend upon whether the list is configured to alter the subject line or not. I suggest that ADSP-compliant mailing lists should be advised to reject "discardable" messages whether or not they will be breaking the signature. The point here, I suppose, is that forwarders that are meant to forward to a single individual (as happens with my <[email protected]> address) are one species, and should get one set of advice, while forwarders that are meant to fan out to multiple recipients (as with mailing lists) are a different species, and should get different advice. And that latter advice very much depends upon what we mean "discardable" to be for. Barry _______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html
