On Thu 17/Nov/2022 00:56:12 +0100 Roland Turner wrote:
On 17/11/22 04:59, Alessandro Vesely wrote:
I fancied an experiment where a MLM offers a per-subscriber choice on whether
to munge From: or not. The way I envisaged it was to have users whitelist the
ARC/ DKIM signing domain concurrently with their opting for non-munged From:.
Mailbox providers could maintain per-user whitelists. But it was rejected by
the ISE...
That's a lot of moving parts. Quite apart from needing mailbox providers
needing to provide a means to do this, it requires that the user making the
munging decision act in concert with all of the other list subscribers (if I
specify non-munging then all other subscribers must whitelist in order to
receive my posts), which doesn't seem at all feasible.
No, it's the other way around. If you opt for non-munging, then just the
messages sent to you will not be munged, irrespective of the author.
Smaller mailbox providers operating without the benefit of security data
of some sort, yes.
What security data?
Whatever a data provider might provide that's helpful. Most server-side
anti-spam products already include some sort of data exchange (or at least
feed) to allow decision-making by small receivers to be supported by a much
broader picture of the behaviour of abusers than they can obtain from their own
logs.
You mean DNSxLs, antivirus feeds, Pyzor and similar stuff? Not any kind of MTA
to MTA exchange?
Best
Ale
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