Dear Symatec,
My customer use my hosting email service in VPS 107.173.88.135, and then they inform me, that they can not send email to their partner.
They receive message below
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Subject: Mail delivery failed: returning message to sender
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
steven.thor@aedas.com
host cluster4.us.messagelabs.com [216.82.242.33]
SMTP error from remote mail server after initial connection:
501 Connection rejected by policy [7.7] 5512, please visit www.messagelabs.com/support for more details about this error message.
Action: failed
Final-Recipient: rfc822;steven.thor@aedas.com
Status: 5.0.0
Remote-MTA: dns; cluster4.us.messagelabs.com
Diagnostic-Code: smtp; 501 Connection rejected by policy [7.7] 5512, please visit www.messagelabs.com/support for more details about this error message.
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In this VPS, has only 2 customers and me.
- 2 customers use email hosting
- I use 2 WHMCS to manage customers, sometimes WHMCS send email to welcome customers, confirm their orders and notice customers when their services expire.
- We don't send spam email.
Please help me to solve this issue, for my customers can send email
Thank you very much