At 23:45 07/23/2003 Wednesday, John Lyon wrote: >> On behalf of my alumni association, I use a service, WHATHELPS.COM which >> hosts three lists for us for a nominal monthly amount using listserv 1.8e. >> >> We average about 10 msgs a day on our list and are getting the following >> error about once a day and cannot figure out why. the email address is >> valid. Any ideas? >As far as the reason for the bounce, it seems the mailer had a temporary >problem handling mail for a good address, which is unfortunately not that >unusual. >> 1 07/19 07/19 John Gayer <[log in to unmask]> >> Last error: 5.1.1 Mailer [64.49.220.152] said: "550 5.7.1 >> Unable to relay for [log in to unmask]" If you are NOT getting alot of bounces on your list, then for diagnostic purposes, assuming that the WHATHELPS. folks don't have any further insights, then temporary turn OFF the AUTO-DEL processing so that you can "see" the full bounced e-mail. I suspect that this kind of mail is an "after hours" kind of bounce e.g., some maintenance is taking place on the end-user's email system that inhibits his mail account from being confirmed as valid. /Pete