>I am trying to figure out why our ListServ (1.8e) is removing the wrong email address from our lists during probes. Below is an example of (X) email address being deleted when (Y) email address is the incorrect one. I wish I had more info to provide. Has anyone else experienced this? Not removal, because I stopped trusting Auto-Delete's judgment and switched it to Manual. But the business of matching an error for one subscriber to another subscription seems to me to be a characteristic of certain destination domains. I infer that it might be caused by the way certain email handlers report errors. I think (and here the L-Soft mavens may correct me) that when there are a group of subscribers on the same list, some of the processing for delivery of their individual copies may be combined in such a way that the whole set of recipients is known to the destination email system, in connection of its handling of any given copy. The problem arises when that system reports a delivery failure for one of the addresses, but sends back that report in connection with all of them. I had one subscriber address go bad out of about 25, but all of them--everyone receiving list email in that domain--showed up on my error summary. Each report listed the same address as having the problem. I bounced a test message off that address to verify it was bad, then NOMAILED it (and temporarily shortened my Auto-Delete= Delay setting to screen out the bogus reports until they timed out). Just in case the use of NOMAIL wasn't clear: I often suspend delivery to a subscriber with a problem and send test messages for a while before deleting them. Once in a while one of them comes back, even when the error appeared to be permanent. I have been reading your posts with interest. It looks like your domain might use the same software as the organization that had the problem on my list. Hal Keen