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feat: ignore client-supplied POP3 credentials #15

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lyrathorpe merged 1 commits from feat/ignore-pop-credentials into main 2026-06-17 18:16:38 +01:00
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lyrathorpe commented 2026-06-17 18:10:05 +01:00
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Accept any POP3 USER/PASS from the client and discard them. The proxy always authenticates to the IMAP backend with the configured BACKEND_IMAP_USER / BACKEND_IMAP_PASS.

Changes

  • handle_user / handle_pass: accept client credentials unconditionally, no validation.
  • authenticate: always use backend credentials; remove the fallback that connected with client-supplied credentials when backend credentials were unset. Raise a clear configuration error when backend credentials are missing.
  • Tests: client credentials are ignored; missing backend credentials are reported.

Closes #14

Accept any POP3 `USER`/`PASS` from the client and discard them. The proxy always authenticates to the IMAP backend with the configured `BACKEND_IMAP_USER` / `BACKEND_IMAP_PASS`. ## Changes - `handle_user` / `handle_pass`: accept client credentials unconditionally, no validation. - `authenticate`: always use backend credentials; remove the fallback that connected with client-supplied credentials when backend credentials were unset. Raise a clear configuration error when backend credentials are missing. - Tests: client credentials are ignored; missing backend credentials are reported. Closes #14
lyrathorpe added 1 commit 2026-06-17 18:10:05 +01:00
feat: ignore client-supplied POP3 credentials
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Details
78a3c21ac7 
POP3 clients may be required to send USER/PASS, but the proxy never uses
them. Accept any client credentials blindly and always authenticate to the
IMAP backend with the configured BACKEND_IMAP_USER / BACKEND_IMAP_PASS.

Remove the previous fallback that connected to the backend using
client-supplied credentials when backend credentials were unset; the proxy
now raises a clear configuration error in that case.

Add tests covering that client credentials are ignored and that missing
backend credentials are reported.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
lyrathorpe merged commit 9a4bab33e2 into main 2026-06-17 18:16:38 +01:00
lyrathorpe deleted branch feat/ignore-pop-credentials 2026-06-17 18:16:40 +01:00
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Reference: lyrathorpe/legacy-email-proxy#15