VMSmail is not a RFC822 interface, unfortunately. The system manager must decide what should work at the expense of what. One of the options is to make delivery errors work at the expense of replies. Most people make replies work at the expense of the other options. Some lists don't run in "safe" mode, usually because they run at sites with an obsolete version of XMAILER, and have no option but to set the delivery error return address to the list name. Eric