MailEnable cannot send emails: could not resolve domain name

Created:

2016-11-16 13:25:27 UTC

Modified:

2017-04-24 11:33:56 UTC

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MailEnable cannot send emails: could not resolve domain name

Applicable to:

  • Plesk 11.0 for Windows
  • Plesk 11.5 for Windows
  • Plesk 12.0 for Windows
  • Plesk 12.5 for Windows

Symptoms

Outgoing emails are not being delivered. The mail server is MailEnable.

The following errors are shown in the MailEnable SMTP-Debug log:

ME-I0026: [71F2BE266CCF446CA0B9225A0DD2D496.MAI] Sending message
ME-E0042: [71F2BE266CCF446CA0B9225A0DD2D496.MAI] - SMTP Connection DNS Server could not resolve domain name (yahoo.com) in a timely fashion. Check DNS Server settings.
ME-E0059: [71F2BE266CCF446CA0B9225A0DD2D496.MAI] Message Delivery Failure. Attempt (0): Could not connect to mail server for domain (yahoo.com). The remote mail server could not be contacted at this time. Message has been requeued.

Cause

  • The configured DNS server does not work.

  • Network connection issue

Resolution

  • Update Mail Enable DNS configuration:
  • Open MailEnable MMC.
  • Go to Servers > localhost > Services and Connectors > SMTP > Properties .
  • Check that the configured DNS server is working and that connection to the DNS from the server is possible. If this connection is not possible, use the Google DNS - 8.8.8.8.

    SMTP Properties

  • Make sure sever is able to resolve any public host:

    ping autoinstall-win.plesk.com

    Pinging autoinstall-win.plesk.com [93.184.221.133] with 32 bytes of data:
    Request timed out.
    Request timed out.
    Request timed out.
    Request timed out.

    Ping statistics for 93.184.221.133:
    Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

If the output like above, please contact your network administrator then.

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