Add retry timeout fix to ChangeLog

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index 218d25567ff429688b21a9ae67f19bfc4ddc918c..577ac39f09a54abce75fa4375e7594ec5564a79b 100644 (file)
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -96,6 +96,30 @@ PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
       protocol violation error.  Also, make Exim more robust to bad
       data from the Dovecot auth socket.
 
       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
 -------------------
 
 Exim version 4.80.1
 -------------------