j-chkmail assigns a unique identifier for each connection it handles. It looks like this : 48E741CC.002.
Also, each message has a unique identifier which is composed by the connection ID and the order of the message inside that connection. E.g., 48E741CC.002.004, is the fifth message of the connection identified by 48E741CC.002.
j-chkmail inserts some headers to each message it handles, including the connection ID, to allow mail servers administrators to identify the message and search for more information whenever he needs.
Message Headers
X-Miltered: at paris.ensmp.fr with ID 48E75E8A.003 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-j-chkmail-Enveloppe: 48E75E8A.003/79.165.216.74/[79.165.216.74]/uidgimnn/<sdenyseym@themindgroup.com> X-j-chkmail-Score: MSGID : 48E75E8A.003 on paris-2 : j-chkmail score : XXXXXX : R=. U=. O=# B=0.991 -> S=0.994 X-j-chkmail-Status: Spam HI