using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
Previously the "utf8" would be re-prepended for every additional message.
+JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
+ one parent address was copied, and bogus data was used at delivery-logging
+ time. Either a crash (after delivery) or bogus log data could result.
+ Discovery and analysis by Tim Stewart.
+
Exim version 4.91
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