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Please remove my company mail .sinopost.co.uk from blacklist

    Question

  • I don't know why i get blocked by hotmail, which cause big problem for my stuff to communicate with our clients who is using hotmail. 

    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:
     
      sdnjz@hotmail.com
        host mx1.hotmail.com [65.55.92.136]
        SMTP error from remote mail server after MAIL FROM:<contact@sinopost.co.uk> SIZE=19634:
    550 SC-001 (SNT004-MC1F18) Unfortunately, messages from 162.144.129.105 weren't sent. Please contact your Internet service provider since part of their network is on our block list. 

    Thursday, May 07, 2015 2:24 AM

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