Change log file for Exim from version 4.21
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+Exim version 4.74
+-----------------
+
+TF/01 Failure to get a lock on a hints database can have serious
+ consequences so log it to the panic log.
+
+TF/02 Log LMTP confirmation messages in the same way as SMTP,
+ controlled using the smtp_confirmation log selector.
+
+TF/03 Include the error message when we fail to unlink a spool file.
+
+
Exim version 4.73
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