-----Original Message-----
From: ietf-dkim-bounces(_at_)mipassoc(_dot_)org
[mailto:ietf-dkim-bounces(_at_)mipassoc(_dot_)org] On Behalf Of Alessandro
Vesely
Sent: Friday, May 27, 2011 9:08 AM
To: ietf-dkim(_at_)mipassoc(_dot_)org
Subject: Re: [ietf-dkim] MLMs and signatures again
Certainly a possible feature, but it seems like it won't scale very
well.
Why not? Of course, having a copy of each subscription record would
roughly double the database, globally. "Twice" is scalable, though.
An automated system to monitor mail flows to figure out lists to which users
have subscribed or unsubscribed can't scale unless there are standards around
how to do that, and everyone participates. That's a high bar to set.
A manual system requires users to register lists they join or depart. That's
bound to be increasingly inaccurate over time. And if every Gmail user
subscribes to just two lists, that's an awfully large number of relationships
to track and check on each message transiting their MTAs.
I could be wrong, but it sounds like a nightmare.
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