Article ID: 117257, created on Sep 15, 2013, last review on Jun 17, 2016

  • Applies to:
  • Plesk 12.5 for Windows
  • Plesk 12.0 for Windows
  • Plesk 11.0 for Windows
  • Plesk 11.5 for Windows


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 ( 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 ( The remote mail server could not be contacted at this time. Message has been requeued.


  • The configured DNS server does not work.

  • Network connection issue


  • Update Mail Enable DNS configuration:

    1. Open MailEnable MMC.
    2. Go to Servers > localhost > Services and Connectors > SMTP > Properties.
    3. 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 -

    SMTP Properties

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

    Pinging [] with 32 bytes of data:
    Request timed out.
    Request timed out.
    Request timed out.
    Request timed out.
    Ping statistics for
        Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

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

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