On Sun, Jul 20, 2025, at 00:58, Dave Crocker wrote: > On 6/18/2025 2:15 PM, Bron Gondwana wrote: >> But also, did a lot of thinking about how to support multiple RCPT-TO in a >> single SMTP transaction. > > > Bron, Hi. > > Simple question: Why? >
Simple answer - I spoke to someone from Microsoft about their Enterprise architecture and the kind of mail usage patterns they see. > There was extensive discussion about multiple recipients here, on the working > group mailing list, where decisions are made for the working group's woirk. > > I am pretty sure my reading of that discussions is accurate, which simplifies > to: the number of cases that currently use multiple recipients is > vanishingly small, and so such support is not essential. > > *Adding mechanisms that are intended to support vanishingly small portions of > cases -- and especially where that support only provides efficiency rather > than necessary functionality -- is pretty much always a terrible idea for a > global standard.* > True, but we only have a fraction of the world's users on this mailing list, which is why I've been actively trying to talk with people who aren't here, but who do chunks of the world's email. > It adds complexity to everyone's code, needs testing and ongoing support, and > gets excercised infrequently enough to make it likely that it won't actually > work when it is needed. That is, it is expensive and fragile. > > And then there is the small matter of working group rough consensus that runs > contrary to the pretty-clear rough consensus that I thought I saw before, > /against/ support for multiple addressees in a DKIM signature. > I was one of the driving voices behind wanting to simplify things to only have one address, but I'm persuaded enough by the feedback I've had about corporate email usage patterns that I feel it's worth investigating how to better support them. Bron. -- Bron Gondwana, CEO, Fastmail Pty Ltd / Fastmail US LLC [email protected]
_______________________________________________ Ietf-dkim mailing list -- [email protected] To unsubscribe send an email to [email protected]
