from SMTP input. Previously it was always done; now only done for DATA
and not BDAT commands. CVE-2017-16944.
+JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
+ to the message (such as an overlong header line). Previously this was
+ not done and we did not exit BDAT mode. Followon from the previous item
+ though a different problem.
+
Exim version 4.89
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