As far as I am aware of LISTSERV technology, NO -- you can't do anything about what and when the user's host generates. Based upon previous discussions herein, I don't think these are RFC- nor mailer- compliant messages, therefore, LISTSERV passes them on to the operand of the list's keyword * ERRORS-TO= The way *I* deal with such is to have a separate account/userid (in actuality, a private BBS gateway) listed as the operand of the ERRORS-TO= where it does NOT interfere with my REAL e-mail (and duties). /Pete Weiss at Penn State