Exchange EDGE tries to deliver via IPv6 even though it is disabled

Mr Mind 1 Reputation point

I have on-premise Exchange deployment with EDGE server delivering email. The IPv6 has been disabled all along via Registry key. More and more local small companies are implementing IPv6 addressing and for some reason my EDGE server is trying o connect via IPv6 and can't, email goes to queue and sits there. If I tried to Retry email from the queue it get delivered via IPv4. Why is this happening?

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
7,389 questions
0 comments No comments
{count} votes

2 answers

Sort by: Most helpful
  1. Xzsssss 8,861 Reputation points Microsoft Vendor

    Hi @Mr Mind ,

    Have you checked the settings on the Connectors of Edge?
    Also are you using the MX record or Smart host to route?

    You can use the following command to check the IPAddress in using by your Edge send connector.

    Get-SendConnector -Identity "EdgeSendConnectorName" | FL Name,SourceIPAddress  


    If the response is helpful, please click "Accept Answer" and upvote it.
    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

    0 comments No comments

  2. Mr Mind 1 Reputation point

    Yes, it is set to use MX record.

    SourceIPAddress :