>utilizing an alternate SMTP server on exchange 5.5...the message was >sent properly to all the members of the distribution list, with only >a nondelivery error to the one incorrect address.
That's because the second server was not eligible to give a 550 error for the invalid user, since it isn't the MX for the domain. >So it seems that this is a problem with the Imail server. Actually, it's a problem with Outlook, well-known at that. While the MUA can do so if it wants, there's little practical reason to abort a transaction just because it sees a 550 on one recipient. But that's what's happening. Sandy Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit the Knowledge Base for answers to frequently asked questions: http://www.ipswitch.com/support/IMail/
