[ietf-dkim] What can we ask mailing lists to do?
steve at wordtothewise.com
Tue Aug 24 20:17:18 PDT 2010
On Aug 24, 2010, at 6:35 PM, John R. Levine wrote:
>> may I suggest we stop here for a moment and get back to the original
>> question, which in essence was: should a 1st signer DKIM signature be
>> preserved 'coûte que coûte' when a message is handled by a MLM, or not.
It shouldn't, at least not if it means the MLM has to modify it's behaviour significantly. Subject line tags, unsubscription footers, that sort of thing are all useful features that shouldn't be sacrificed at the altar of theoretical ADSP corner cases.
> The answer is yes, sure, but that's the same answer I'd offer if you asked if spammers should set the evil bit (RFC 3514) when sending their mail.
> As others have noted, list software does what it does, list managers do what they do, and the chances that they will do anything we ask drop radically as we make more demands on them.
> I think it's reasonable to encourage them to put a list signature on outgoing mail. It'll probably help them get the list mail delivered,
It won't hurt.
> and in the common case that the MLM uses some other program as its MTA, some tweak to the MTA will likely be adequate, so they won't have to mess with the MLM's configuration. (I speak from experience here.) Beyond that, we can make suggestions, but we've dropped off the cliff.
Warning list managers that accepting mail from individuals at ADSP using domains may cause operational problems for the list operator and other subscribers is something that's been mentioned previously.
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