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+To enable us investigating errors or problems you should provide us
+with more information.
+
+Helpful would be: (we don't need all, provide as much as possible)
+
+ * the IP,
+ * the Time (including timezone),
+ * the Message-Id,
+ * the Adresses you sent from and to,
+ * maybe some more things that could be related with that problem.
+
+We maintain a system with more than 150000 subscribers which gets
+and sends a lot more than 1000000 Mails a day, without that
+information we have no chance to find out what went wrong.