On Tue 28/Jul/2020 19:41:34 +0200 John Levine wrote:
In article <[email protected]> you write:
In the pre-DMARC era, we've been mainly using just From:. Sender: is used by
Outlook to display "on behalf of" catchphrase, presumably in an attempt to
support the historic Sender-Id protocol.
Sorry, no. That is completely wrong. The Sender field has been part of
e-mail since RFC 724 in 1977. The now-dead Sender-ID didn't come along
until the 2000s. Outlook's annoying "on behalf of" at least matches the
intention of the Sender field.
You're right. Outlook was using "on behalf of" even before Marid.[*] So
perhaps Sender-ID derived from that usage, rather than the other way around.
Best
Ale
--
[*] https://bugzilla.mozilla.org/show_bug.cgi?id=221054
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