When you send an e-mail message through a Microsoft Exchange or Microsoft Outlook client of Microsoft Exchange Server 5.0, you may receive the following non-delivery report (NDR) even though the
Delivery Restrictions-Accept From list correctly lists your mailbox:
Your message did not reach some or all of the intended recipients.
Subject: test
Sent: 9/30/99 1:01:20 PM
The following recipient(s) could not be reached:
Doe, Jane on 9/30/99 1:01:22 PM
The originator does not have permission to submit message MSEXCH:MSExchangeIS:Machine200:ServerName
Such NDRs may appear randomly, originating from the information store, from the Internet Mail Service, or from other Microsoft Exchange Server components.