troubleshooting Question

Exchange 2007 and Exchange 2003

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fanman8302Flag for United States of America asked on
ExchangeEmail Servers
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I am having a issue with my exchange servers that are in different domains now. Once all my users were on one exchnage server 2003 and the companies split and a different domain was created. The users are migrated over without issues and the new ISP is configurated to send emails to the exchange 2007 but the issue i am having now is that i can send or recieve emails from exchanger server 2003 with the error message that " your message was rejected because of securities policies" When i go to the event viewer on exchange 2003 i see some messages being rejected by IMF. When i send a email from Exchange 2003 to 2007 there is no error message it never delivers.  Lost at this point any help would be great .

PS. I can send and receive emails to micrsoft support without issues as well as my blackberry and  att email accounts.
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