Email Threat Detection and Response

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Your Email message was unable to be sent because your mail server rejected the message

  • 1.  Your Email message was unable to be sent because your mail server rejected the message

    Posted Oct 14, 2018 08:40 PM
      |   view attached

    Intermitantly  recieving  error   attched to this forum . 

    BOTH emails are in working order 

    "Your Email message was unable to be sent because  your mail server rejected the message "



  • 2.  RE: Your Email message was unable to be sent because your mail server rejected the message

    Posted Jan 15, 2019 10:23 AM

    We have had the same problem today.

    The reason was, that our outgoing E-mail servers administrator has changed the SMTP port from port 25 to port 587.

    Changing this port in Outlook solved our problem at the company.