Received: from localhost by CS.UTK.EDU with SMTP (cf v2.9s-UTK) id GAA12628; Mon, 1 Jan 1996 06:27:10 -0500 Received: by CS.UTK.EDU (bulk_mailer v1.3); Mon, 1 Jan 1996 06:24:53 -0500 Received: from nameserver.utcc.utk.edu by CS.UTK.EDU with SMTP (cf v2.9s-UTK) id GAA12296; Mon, 1 Jan 1996 06:24:47 -0500 Received: from ester.dsv.su.se by nameserver.utcc.utk.edu (4.1/2.8s-UTK.UTCC) id AA11896; Mon, 1 Jan 96 06:20:34 EST X400-Received: by /PRMD=SUNET/ADMD=_/C=SE/; Relayed; 01 Jan 96 12:17:53+0100 Date: 01 Jan 96 12:17:53+0100 From: "Jacob Palme DSV-SU/KTH" Message-Id: <1227567*jpalme@su-kom.dsv.su.se> References: To: ietf-drums Subject: loop detection The "Mailing-List:" header field, which has been discussed earlier, would also be very useful for loop detection. And when using this header field (to detect list circularities) no hashed recipient list is needed, as long as the loop detection only is used to stop the same message from being expanded twice by the same mailing list.