Undelivered Mail Returned to Sender

Undelivered Mail Returned to Sender

  1. 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.

    **********@outlook.com, ERROR CODE :554 - 5.2.1 Too many failures for the recipient



    Reporting-MTA: dns; mx.zohomail.com
    Arrival-Date: Tue, 19 Sep 2023 08:19:50 +0400

    Original-Recipient: rfc822; **********@outlook.com
    Final-Recipient: rfc822; **********@outlook.com
    Status: 554
    Action: failed
    Last-Attempt-Date: 19 Sep 2023 04:19:54 GMT
    Diagnostic-Code: 5.2.1 Too many failures for the recipient


    Received:from mail.zoho.com by mx.zohomail.com
        with SMTP id 169509719027625.406818346807086; Mon, 18 Sep 2023 21:19:50 -0700 (PDT)
    Message-ID:<18aabaa76bb.ea79d5b9541915.6794117871676993504@**********.com>
    Date:Tue, 19 Sep 2023 08:19:50 +0400
    From:Rehan Rathnaweera <rehan@**********.com>
    To:"Rehanratnaweera" <**********@outlook.com>
    Subject:tesst
    Content-Type:multipart/alternative;
        boundary="----=_Part_1727960_254136330.1695097190079"
    User-Agent:Zoho Mail
Why is this happening? first it was because of a Spamhaus blacklist issue and now I get this after getting Spamhaus to drop my domain from the blacklist, can anyone please tell me what's happening.

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