fix issue #6589: cleanup asyncore.socket_map if smtpd.SMTPServer constructor raises an exception
diff --git a/Misc/NEWS b/Misc/NEWS
index f93f5a9..1625c0c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -51,6 +51,9 @@
 Library
 -------
 
+- Issue #6589: cleanup asyncore.socket_map in case smtpd.SMTPServer constructor 
+  raises an exception.
+
 - Issue #8959: fix regression caused by using unmodified libffi
   library on Windows.  ctypes does now again check the stack before
   and after calling foreign functions.