> Brian E Carpenter wrote: >> >> Michael Richardson wrote: >> >>> Regardless of how/if/why/when we process DMARC as a specification, >>> we need to decide how ietf.org MTA is going to deal with things. >> >> I thought the preferred solution was to rewrite the From for >> those users only. Sound like a reasonable approach to me. Hector Santos wrote: > > -1. > > Its not the preferred solution. Not one iota. Please don't endorse > this radical "email game changing" behavior. Since you are among the > "top IETF key cogs," if its preferred among the IETF key cogs, as you > are making it sound, then this is not good at all. It would be a > serious "game changer." It goes to show how much the IETF really > cares about the concerns for the wider and entire mail networking > community which is obviously becoming less and less. It will set a > terrible precedence and obvious security loophole if you crack open > this door. The "From" could never be trusted again and the new > algorithms necessary to separate and categorized the good from the > bad, will be overwhelming and complex at all levels. > > Plus, if you ask and explore the risk and liability issues with your > chief council, you could be playing with fire here. I wouldn't do it. > Bad idea. I don't have the slightest idea what you're talking about. Mailing lists @ietf.org are proper recipients of EMail, and ietf.org has discretion to modify what it receives before it distributes postings in new and seperate SMTP transactions to mailiing list recipients. Knowing that some recipients (or more appropriately the relays that take mail for these recipients) will choke on rfc5322-from with mailboxes for which DMARC policies have been published, the ietf.org mail exploder could decide to either reject postings, or to remove or modify the information that is known to cause that choking. Removing/replacing or rewriting offending mailboxes in rfc5322-from would all be perfectly acceptable solutions to the problem that minimize the impact on users (not require them to get a new mail account from a more interoperable mail provider). The fact that From: has traditionally been carried through was to provide convenience to the mailing list subscribers and to facilitate recognizing the (alleged) authorship of the contents. -Martin