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feat(unsubscribe): RFC 8058 one-click unsubscribe on feed deletion

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Capture each sender's List-Unsubscribe one-click URL during ingestion
(stored per sender in feed metadata, mirroring the iconDomain pattern) and
fire one-click POSTs via ctx.waitUntil when a feed is deleted, so newsletters
stop mailing the now-dead address. Tracked with a new unsubscribes_sent
counter surfaced on the status page and /api/stats.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Julien Herr
2026-05-23 14:35:05 +02:00
parent eb12f21894
commit 3ad0188bc0
14 changed files with 558 additions and 4 deletions
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TODO.md
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@@ -22,7 +22,7 @@ Feature gaps identified by comparing with [kill-the-newsletter](https://github.c
- [x] **Per-feed favicon from the last sender's domain** — give each feed an icon by fetching the favicon of the last sender's domain, so feeds are visually distinguishable in readers and the admin UI. Resolve the domain from the most recent email's `from`, fetch its favicon (e.g. `https://<domain>/favicon.ico` or a parsed `<link rel="icon">`, with a fallback service), and cache the result aggressively (KV/R2 + Cache API with a long TTL) so it isn't re-fetched on every request. Expose it via the RSS `<image>` / Atom `<icon>` and the admin feed list.
- [ ] **RFC 8058 one-click unsubscribe on feed deletion** — when a feed is deleted, automatically unsubscribe from the newsletters that fed it so messages stop arriving at the now-dead address. Parse and store the `List-Unsubscribe` / `List-Unsubscribe-Post` headers ([RFC 8058](https://www.rfc-editor.org/rfc/rfc8058.txt)) from incoming emails, then on deletion POST `List-Unsubscribe=One-Click` to each stored unsubscribe URL. Requires capturing the headers during ingestion (`src/lib/email-processor.ts`) and firing the outbound requests from the feed-delete paths (`src/routes/admin/feeds.tsx`), ideally via `ctx.waitUntil`.
- [x] **RFC 8058 one-click unsubscribe on feed deletion** — when a feed is deleted, automatically unsubscribe from the newsletters that fed it so messages stop arriving at the now-dead address. Parse and store the `List-Unsubscribe` / `List-Unsubscribe-Post` headers ([RFC 8058](https://www.rfc-editor.org/rfc/rfc8058.txt)) from incoming emails, then on deletion POST `List-Unsubscribe=One-Click` to each stored unsubscribe URL. Requires capturing the headers during ingestion (`src/lib/email-processor.ts`) and firing the outbound requests from the feed-delete paths (`src/routes/admin/feeds.tsx`), ideally via `ctx.waitUntil`.
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