--- /dev/null
+# Overlong header lines and SMTP errors
+need_ipv4
+#
+exim -DSERVER=server -bd -oX PORT_D
+****
+client 127.0.0.1 PORT_D
+??? 220
+mail from:<x@y.x>
+??? 250
+rcpt to:<x@test.ex>
+??? 250
+data
+??? 354
+From: Me <x@y.z>
+Comment: This was really seen!
+To: bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ bad@address;bad@address;bad@address;bad@address;bad@address;bad@address;
+ END
+.
+??? 550
+quit
+??? 221
+****
+killdaemon