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Response: 553 #5.1.8 Domain of sender address does not exist

  • 1.  Response: 553 #5.1.8 Domain of sender address does not exist

    Posted Mar 13, 2020 11:25 AM
    Edited by Ashley Brogdon Mar 13, 2020 11:25 AM
    Hi All,

    we are facing an issue when user's send email to one specific domain there is showing failure message like 
    Response: 553 #5.1.8 Domain of sender address does not exist


    this issue is facing on only one domain.

    please find the below logs which we have getting from symantec email dlp cloud console.

    Connection from: 18.237.140.176 (p01a.mail.dlp.protect.symantec.com)
    2020-03-09 11:54:45 AM
    Sending server HELO string:mail.ds.dlp.protect.symantec.com
    2020-03-09 11:54:45 AM
    Message id:SG2PR02MB3531AC2C646A5B107D8D5C19C2FE0@SG2PR02MB3531.apcprd02.prod.outlook.com
    2020-03-09 11:54:45 AM
    Message reference: 158373508500000001402010001332033
    2020-03-09 11:54:45 AM
    Sender: xxx
    2020-03-09 11:54:45 AM
    Recipient: xxx
    2020-03-09 11:54:47 AM
    SMTP Status: OK
    2020-03-09 11:54:50 AM
    Delivery attempt #1 (final)
    2020-03-09 11:54:50 AM
    Recipient server: 80.78.5.243 (mx4.atos.net)
    2020-03-09 11:54:50 AM
    Response: 553 #5.1.8 Domain of sender address does not exist

    we are using symantec email secuirty only for outgoing