I am having a big problem and can't figure it out. This just started over the weekend. We have a SBS 2003 with Exchange 2003. All outgoing external email is being bounced back. It is happening to all emails. I have tried with
" housing.apollohosting.com as the smart host and the message says the email account does not exist where it was sent to and is rejected.
When I put the IP address of our email host we get the message that there was a SMTP communication problem with the recipient's email server and says
No unauthenticated relaying permitted. The messages are stuck in queue with this option and not the other.
I can send external on Outlook that is not on the Exchange.
Any and all help is greatly appreciated.
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