-message to the originator or to the local postmaster. Fetchmail crashes
-when trying to free the dynamic array of failed addresses, and calls the
-free() function with an invalid pointer.
-
-Note that such messages are not RFC-822 conformant, so if the server has
-not been tampered with, the server software is faulty.
+message to the originator or to the local postmaster. The crash happens
+after the bounce message has been sent, when fetchmail tries to free the
+dynamic array of failed addresses, and calls the free() function with an
+invalid pointer. This bug was introduced short before fetchmail 6.3.0
+and is not present in the now discontinued 6.2.X series (see below).