I've searched for this but haven't found an answer. And I apologize at the start that this will probably go on...
We wanted to create more secure connectors on our exchange 2007 servers as we only had a default one (accepting from any IP) and also a External Relay Connector (for use of our Application servers/sister org. We share our GAL with a sister organisation (different Exchange org) and today when we set up some new connectors with specific authentication settings (externally secured) and were going to get the sister org to relay their mail to exchange 07 instead of our soon to be replaced Exchange 2003 servers (that had the resolve anonymous email setting configured). We created the new connector, configured it to allow the specific IPs of the Exchange servers in the sister org to connect (Authentication was set as Externally secured, the permission group was Exchange Server). This just seemed to stop all the mail from being routed to us from the sister organisation (which was successfully travelling down to the Exchange 2003 server which in turn relays to Exchange 2007 where our mailboxes are hosted). So we start looking at why they cant get mail delivered and are connecting to various servers to make telnet sessions to various locations seeing which connector accepts the connection. We notice that if we connect from one of our application servers and send a telnet smtp message it will be delivered but in the headers of the mail the recipients are set as 'to: undisclosed recipients' and the To field is blank in outlook. We don't know why this is happening, we certainly don't want mails arriving with a blank To: field. Another strange thing (that may be related to the above) is that when we telnet to our exchange 2007 server we can run through the SMTP commands and get a Recipient OK, but if we telnet to Exchange 2003 we don't get a 250 Recipient OK message (we are expecting to see one (we think!?)). This is probably not very helpful and i am becoming very cross-eyed and need to go home for food, i just thought that i would throw out there the undisclosed recipients thing as we are just not sure why it is happening. We have 3 exchange 2003 servers, 3 Ex 2007 servers (2 hub transport and 1 mailbox), all on the same lan. Any ideas would be very gratefully received, not necessarily the answer just pointed in the right direct would be useful. Ta Colin _______________________________________________________________ RCUK Shared Services Centre Limited (RCUK SSC Ltd) is a limited company registered in England and Wales (with company number 6330639) and has its registered address as North Star House, North Star Avenue, Swindon, Wiltshire SN2 1FF. This email may have a protective marking, for an explanation please see http://www.ssc.rcuk.ac.uk/fin/Documents/RCUKSharedServiceCentreLtd.pdf. This email and any attachments are intended for the named addressee(s) only. If you are not the intended recipient, please notify RCUK SSC Ltd immediately and do not disclose, distribute, or retain this email or any part of it. While RCUK SSC Ltd has taken every reasonable precaution to minimise risk of this e-mail or any attachments containing viruses, the recipient should carry out its own virus checks before opening the attachments. RCUK SSC Ltd does not accept any liability for any losses or damages which the recipient may sustain due to presence of any viruses. RCUK SSC Ltd reserves the right to monitor all e-mail communications through their networks for the purposes of preventing and detecting crime. _______________________________________________________________ This message has been scanned by the WebRoot Email Security Service. For more information please visit http://www.webroot.com _______________________________________________________________ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
