Hi Everyone, and thanks in advance for any help.I have a freshly installed Exchange 2007 server install which is coexisting with a Exchange 2003 server. All inhouse e-mail, between 2003 and 2007 mailboxes are fine. External email to 2003 mailboxes no problem. External email to 2007 mailboxes....nada? OWA and Outlook anywhere to 2003 and 2007 mailboxes...no problem. It seems to me that it should be a receiving connector issue, but everything semms perfect. Any ideas?RGB

Does sender get any NDR when they send mail to Exchange 2007 mailbox? Do you see any mail sitting in Exchange 2003 Queues?Amit Tank | MVP Exchange Server | MCITP: EMA | MCSA: M | http://ExchangeShare.WordPress.com

Hi,As Amit said, whether senders are getting NDR message when sending mail to E2K7 recepinets.What is your environment for internet mail landing into your ENV ??Once you installed first exchange 2007 HUB then you had given exchange 2003 server for BH for E2K7 env. Check if any event id :1035 is occurring in exhnage 2003 server.You may try to create a RGC connector between exchange 2003 (Which is accepting mail from Internet) to exchange 2007.Anil

Check if the Anonymous permission is checked on Recieve Connector of EX2007. and telnet to ex2007 from 2003 and try to submit messagesVinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|