What was wrong with the original header here? It sure looks good to me. Does the parser not handle commas in comments? They are definitely allowed, according to RFC822. Comments: <Parser> E: Mail origin cannot be determined. Comments: <Parser> E: Original tag was FROM: Roger Watt (NetNorth Rep, UnivWaterloo) <ROGERWAT@WATDCS> Comments: Warning -- original Sender: tag was FUTURE-L@BITNIC From: Undetermined origin c/o Postmaster <POSTMASTER@BITNIC> Richard A. Schafer Manager of Systems Support