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"The email server location or the incoming email port specified is incorrect" error in Dynamics 365

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This article provides a solution to an error that occurs when you try to test and enable a mailbox in Microsoft Dynamics 365.

Applies to:   Microsoft Dynamics 365
Original KB number:   4463808

Symptoms

When you try to test and enable a mailbox in Dynamics 365, you receive the following error:

Email cannot be received for the mailbox <mailbox name> because the email server location or the incoming email port specified in the associated email server profile <profile name> is incorrect. The mailbox didn't synchronize. The owner of the email server profile has been notified.

Email Server Error Code: Socket returned exception InvalidIncomingEmailServerProfileConfiguration HostNotFound.

If you select Details, the following additional information appears:

ActivityId: <GUID>
>Error : System.Net.Sockets.SocketException (0x80004005): No such host is known
at System.Net.Dns.GetAddrInfo(String name)
at System.Net.Dns.InternalGetHostByName(String hostName, Boolean includeIPv6)
at System.Net.Dns.GetHostAddresses(String hostNameOrAddress)
at System.Net.Sockets.TcpClient.Connect(String hostname, Int32 port)
at Microsoft.Crm.Asynchronous.EmailConnector.Pop3Client.Connect()

Cause

This error can occur if the server location or port in the email server profile is incorrect.

Resolution

Note

To manage security roles and mailbox settings, you need to sign in to your Dynamics 365 organization as a user with the "System Administrator" role.

  1. Navigate to Settings > Email Configuration, and then select Email Server Profiles.

  2. Open the email server profile used by the mailbox experiencing this error.

    Tip

    You can also select the name of the email server profile in the error message. It appears as a hyperlink that will open the correct email server profile record.

  3. Verify that the Incoming Server Location value is correct.

    Note

    Refer to the documentation from your email provider for the correct addresses. For example, for Gmail, use pop.gmail.com as the incoming server location and smtp.gmail.com as the outgoing server location.

  4. Select Advanced.

  5. Verify that the Incoming Port value is correct, and then select Save.

    Note

    Refer to the documentation from your email provider for the correct ports when connecting to the SMTP service. For Gmail, use port 995 for incoming POP3 connections and port 587 for outgoing SMTP connections.

  6. Select Mailboxes, and then select the mailbox that received the error.

  7. Select the Test & Enable Mailboxes button.

  8. After the test is complete, open the mailbox record and view the Alerts section if the results don't appear as Success.

Third-party information disclaimer

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.