Sorry! I sent that off before realizing something. The accumulating subject tags are delivered only to those using IETF headers. A closer check of our archive (which is not a LISTSERV Notebook, but a separate package receiving mail with FULL headers) indicates the accumulation is always what a user of IETF headers received--minus one subject tag that gets subtracted because of the FULL header processing. Maybe there should be a recommendation that the options for IETF subject tags and sequenced subject tags not be combined. Hal Keen