2.79.3 (2026-08-24)
Upgrade note
The authentication-failure safety net now applies to OAuth2 accounts. It is supposed to stop an account retrying after EENGINE_MAX_IMAP_AUTH_FAILURE_TIME of continuous authentication failures (3 days by default), but it was gated on an IMAP configuration block that OAuth2 accounts do not have, so for Gmail and Microsoft accounts it never fired and a revoked refresh token was retried indefinitely.
On an instance that has accumulated such accounts, every one already past the threshold is disabled on its next failed refresh, so expect a burst of authenticationError webhooks shortly after the restart and a matching drop in token-endpoint traffic. A disabled account stops connecting and shows in the admin UI as "Connection failed"; re-authorizing it lifts the flag and reconnects it, with no manual cleanup. If you would rather stage that, raise EENGINE_MAX_IMAP_AUTH_FAILURE_TIME before upgrading.
Bug Fixes
- accounts: make the auth-failure auto-disable work for OAuth2 accounts (ad52d95)
- imap: keep a connection-scoped rejection from silently killing an IMAP worker (481c181)
- logger: keep the late-handler diagnostic when error tracking is on (8c5def2)
Dependencies
Bundled library updates carrying fixes of their own, which the commit prefixes above do not surface:
- imapflow 1.7.2 -> 1.7.6. Connection errors now name the connection and the site that rejected them, the guard against an unobserved teardown rejection is structural rather than per-site, and an IDLE-break waiter is no longer reported under the command's marker. Also normalizes search dates so an invalid value cannot throw or emit NaN.
- mailparser 3.9.15 -> 3.9.16. Bounds linkify-it scanning of untrusted text bodies, and handles stream-flush errors.
- ioredfour 1.4.2 -> 1.4.3. Moves to ioredis 6, which removes a second copy of ioredis from the dependency tree.
- @postalsys/certs 1.0.18, @postalsys/email-ai-tools 1.13.19, @postalsys/email-text-tools 2.4.14, @bull-board 9.4.0, plus html-to-text and joi deduplication across the tree.