50	Unknown Event(%d)
100	Message Received
102	Report Transfer In
104	Message Submission
107	Message Transfer Out
108	Report Transfer Out
109	Message Delivered
110	Report Delivered
126	Distribution List Expansion
128	Message Redirected
129	Message Re-routed
133	Report Absorption
134	Report Generation
143	Unroutable Report Discarded
1100	Local Delivery
1101	Backbone Transfer In
1102	BackboneTransfer Out
1103	Gateway Transfer Out
1104	Gateway Transfer In
1105	Gateway Report Transfer In
1106	Gateway Report Transfer Out
1107	Gateway Report Generation
2000	no error
2001	The Address Type is Unknown(Not starting with C= or /O=)
2100	User-Defined Event
5000	UNKNOWN ADDRESS TYPE