Re: @debian.org mail
Am 04.06.19 um 17:51 schrieb Graham Inggs:
I would certainly make use of SMTP for sending @debian.org email. I
can't see the advantage of IMAP over forwarding though, would you
explain how you see it working, or who would use it?
I wouldn't need IMAP either. But for those who are stuck with gmail,
hotmail, gmx and the like Debian hosted IMAP servers would mean they
also get a chance to _receive_ all Debian email. Email from @debian.org
to these email domains is currently rejected outright (IPv6 & gmail,
Tencent brands) or often ends up in /Spam (IPv4 & gmail, many other
"free" email providers). We can assume with an updated SMTP setup that
situation will improve significantly but probably not to a 100%. We run
mailing lists without sender address rewrite and ARC isn't there yet.
But if we run IMAP, too, we can simply ensure delivery today (and in the
future).
So having a submission host (SMTP) and a matching SPF policy solves the
sending side of the problem, Debian-hosted secure IMAP the receiving side.
Supporting ARC* will eventually help keep mailing lists and bugs.d.o
functional (for non-Debian-hosted email aka our users) when "the big
players" ratchet up their anti-spam measures further. But that's, by my
very subjective personal estimate, another few years down the line.
I'd probably add Debian hosted webmail, too. It's trivial to add and
some people seem to need it as they spend their day jobs behind very
restrictive firewalls.
* see https://en.wikipedia.org/wiki/Authenticated_Received_Chain for an
explanation. That also explains quite well why plain DKIM / DMARC is
hard to implement without serious side-effects.
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