Add retry timeout fix to ChangeLog

[exim.git] / doc / doc-txt / ChangeLog

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index 99fe090869630dff5370c7708515d7c06b3a47a4..577ac39f09a54abce75fa4375e7594ec5564a79b 100644 (file)
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -91,6 +91,35 @@ JH/12 Add optional authenticated_sender logging to A= and a log_selector
 
 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
 
+PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
+      advertise SMTP AUTH mechanism to us, instead of a generic
+      protocol violation error.  Also, make Exim more robust to bad
+      data from the Dovecot auth socket.
+
+TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
+
+      When a queue runner is handling a message, Exim first routes the
+      recipient addresses, during which it prunes them based on the retry
+      hints database. After that it attempts to deliver the message to
+      any remaining recipients. It then updates the hints database using
+      the retry rules.
+
+      So if a recipient address works intermittently, it can get repeatedly
+      deferred at routing time. The retry hints record remains fresh so the
+      address never reaches the final cutoff time.
+
+      This is a fairly common occurrence when a user is bumping up against
+      their storage quota. Exim had some logic in its local delivery code
+      to deal with this. However it did not apply to per-recipient defers
+      in remote deliveries, e.g. over LMTP to a separate IMAP message store.
+
+      This commit adds a proper retry rule check during routing so that
+      the final cutoff time is checked against the message's age. I also
+      took the opportunity to unify three very similar blocks of code.
+
+      I suspect this new check makes the old local delivery cutoff check
+      redundant, but I have not verified this so I left the code in place.
+
 
 Exim version 4.80.1
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