Good morning all. Since we have gone to listserv 15.5 I get these complaints from listowners. I tell them that they are getting messages indicating someone is trying to use a listserv name to spam their list and avoid identification. Although this message is probably normal, I did not see this with the older version. I am telling them to change errors to [log in to unmask] Is there a better/more effective way to do this. A sample message follows: The enclosed message, found in the SMC5-L mailbox and shown under the spool ID 7028761 in the system log, has been identified as a possible delivery error notice for the following reason: mail origin seems to be a LISTSERV server. Thanks!