Hi,

Suddenly we receive this error for one of the receipient

us2.mx.mailhostbox.com rejected your message to the following e-mail addresses:

us2.mx.mailhostbox.com gave this error: Service currently unavailable Please see http://support.mailhostbox.com/email-administrators-guide/error-codes for explanation of the problem.

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Reporting-MTA: dns;exch.xxxxxxxxxx.my
Received-From-MTA: dns;HRPC
Arrival-Date: Mon, 6 Jul 2015 05:55:08 +0000

Final-Recipient: rfc822;liyana@xxxxx.net
Action: failed
Status: 5.3.2
Diagnostic-Code: smtp;550-5.3.2 Service currently unavailable
 550 5.3.2 Please see http://support.mailhostbox.com/email-administrators-guide/error-codes for explanation of the problem.
Remote-MTA: dns;us2.mx.mailhostbox.com

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Hi Mohd,

worry not, your system is doing fine. The target mail server is currently not fully operational, for whatever reason. If you're friendly with the recipient organization you might call them to notify them of the outage, in case they hadn't noticed.

Cheers,
Fred