On 6/2/20 5:45 PM, Douglas E. Foster wrote:
As to visibility: The business world still runs on Microsoft Outlook,
and **Outlook presents the From Address** when a message is read. So
it is odd to assert that no one ever sees that data.
[Emphasis added]
Regarding this and a subsequent message in this thread from Ale, that
may be true in the message body display, but usually not in folder
views. Once the message is opened the body pane may show the full fields
or not, but often a hasty or preoccupied user is busy reading and
engaging with the content, and it's too late.
Also, I believe this is relatively recent behavior for Outlook. My
recollection is that for many years Outlook was notorious for only
showing the display name (or perhaps in some cases certain Active
Directory fields it looked up) even in the body view. This has changed
at some point but I believe it was true during the original DMARC
effort, and I believe it was still true while this WG was working on the
drafts that led to RFC7489.
However, the versions of Outlook I just checked (Outlook/macOS and
Outlook Web Access) do show both rfc5322.From display name and address
field in the body view some of the time, perhaps most of the time --
but not all of the time. Viewing two messages from the same mailing list
in OWA, one showed both fields and one only showed the display name.
Window size did not appear to be a factor. The same applied for a
periodic message sent from a vendor - both fields displayed in
Outlook/macOS, only the display name in OWA.
And consider the fact that today mobile devices are the MUA of choice
for many/most end users. Mobile MUAs are much less likely to show an
rfc5322.From address field even in the message body view.
--S.
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