Networknet.nl

My inbound email flow on the Exchange 2007 server didn’t work. I was able to send out my emails using the exchange server, but when receiving them the messages were bounced. During my last weeks migrations I configured second mx record at my hosting provider and all emails were caught there; because I also configured outlook to pull that mailbox it seemed that everything worked fine. After getting a strange message at LinkedIn and Gmail I started to troubleshoot and read the error messages.

At Gmail.com I’ve got the message below:

This is an automatically generated Delivery Status Notification

Delivery to the following recipient failed permanently:

    ivan1980@networknet.nl

Technical details of permanent failure:

PERM_FAILURE: SMTP Error (state 12): 530 5.7.1 Client was not authenticated

After reading this message I immediately went back to my Exchange 2007 Receive Connector and verified the authentication and saw that TLS was selected.

I unchecked the TLS settings and applied the Receive Connector configuration. Resend the email from Gmail to my primary account and the email failed again.

I went back again and this time to Network tab of the Receive Connector. I run the ipconfig and saw that the ip addresses did not match. Changed the binding ip address to one assigned to the server and my test from Gmail succeed this time. I can’t figure out why this setting was wrong; maybe I overlooked during the installation and configuration of the Hub Transport role and did not open the properties of my receiving domain.

I am happy my inbound email traffic is flowing into the Exchange store and filling up with SPAM.