Do yourself a favor and download the SMTPDiag tool from Microsoft. This tool will quickly show in verbose mode how a test email negotiates the infrastructure and if so at what step it fails. It is kind of like TRACERT for email traffic.
Do yourself a favor and download the SMTPDiag tool from Microsoft. This tool will quickly show in verbose mode how a test email negotiates the infrastructure and if so at what step it fails. It is kind of like TRACERT for email traffic.