Those are system-generated messages, typically an NDR or a delivery receipt. The relevant SMTP RFCs cover why this is. Neil _____ From: Chris Wall [mailto:Chris.Wall@xxxxxxxxxxxxxxxxxxx] Sent: 12 August 2003 20:34 To: [ExchangeList] http://www.MSExchange.org/ Hello all, Running Win2K SP3 with Exchange 5.5. I just looked at the Outbound Queues for our Internet Mail Service (IMC) in exchange 5.5. There are over 600 e-mails in queue to be sent and over 590 of them say that they are originating from '<>' . What does this '<>' mean? All originating e-mail should be from 'any_user@xxxxxxxxxxxx'. I have relaying locked down to only pc's on my domain. Where are these coming from. Thanks for any info. ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: neil.hobson@xxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ______________________________________________________ This email and any files transmitted with it are confidential and intended solely for the use of the individual to whom it is addressed. Any view or opinions presented are solely those of the author and do not necessarily represent those of Silversands. If you have received this email in error, please contact our Support Desk immediately on 01202 360360 or email help-desk@xxxxxxxxxxxxxxxxx http://www.silversands.co.uk ____________________________________________________