I have an asp.net web page that allowed internal authenicated users to send email to out side internet email address using .Net SMTP, this worked fine with Exchange 2003. We recently upgraded to Exchange 2007 and now we get error 5.7.1 with any internet users outside our domain. Email is succesfuly sent to user in our domain but not outside. I've tried to add a Transport > Send Connectors in Exchange to allow internet mail and than lock it down to the email servers internal IP but still getting the same response. I've also seen where people on this forum have turned on SMTP on the webserver. My question by using the SMTP on the webserver is this by passing the exchange server 2007 all together and sending email directly out, if this is the case don't you lose the exchange server handshanking with the outside servers? I just want to be able to relay mail to the exchange 2007 server via the webserver and have the exchange server send ...
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