How to deal with multiple From: ?

    I was wondering, how to extract the originest sender from a
forwarding mail. Like * ^From can only match the lastest sender,
and it seems the procmail doesn't have any loop character. 

    Thanks.

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tel:(h) (410) 242-1037 (O) (410) 455-2837
Addr: 4403 D Alan Dr. Baltimore, MD 21229