Reviving this thread I started in February because delivery rates continue to
decline, and I get this threat from Google any time I check their Dashboard:
"One-click Unsubscribe: Needs work — Ensure one-click unsubscribe is correctly
implemented for your subscription messages
One-click unsubscribe allows recipients to easily
unsubscribe instead of marking your messages as spam"
Having recently implemented "Feedback-ID" (Google's proprietary-but-required
Feedback Loop mechanism) at my MTA, all this has done is confirm that
0.05-0.10% of subscribers report messages as spam and would probably rather be
unsubscribed but cannot be bothered to figure this out. Having the headers
that make Google/Yahoo/Apple/etc ask "Would you like to unsubscribe from this?"
when they hit the "Junk" button will most likely resolve the problem.
I'm pretty sure, as below, that we need to implement RFC 8058 headers in order
to maintain deliverability to GMail. The only tracker issue I can find related
to this is https://gitlab.com/mailman/mailman/-/issues/1099 -- is that the
best place to discuss implementation?
--Jered
----- On Feb 5, 2025, at 3:36 AM, Stephen J. Turnbull [email protected]
wrote:
[..]
> If we're talking about a new feature, I think the most straightforward
> approach is to use RFC 8058[1] "one click" URLs. I believe it is
> already implemented by Gmail and Yahoo, I don't know about Outlook or
> the open source MUAs. This would require a substantial (but
> straightforward[2]) addition of code, and of course personalized
> delivery (I don't know if anyone balks at that any more, though).
[..]
> Footnotes:
> [1] https://datatracker.ietf.org/doc/html/rfc8058
> [2] That is, we'd need to add a new location in Postorius and code to
> accept POST access to it, encrypt/decrypt functionality to handle an
> opaque token (to prevent automated denial of service by folks without
> access to the person's email) or a table of one-time tokens with
> expiration (same purpose, and expiring so the database doesn't grow
> infinitely). What we wouldn't need to do is to change any exsting
> code.
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