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    Hi,

    We have exchange 2016 DAG, some tim emails are getting bounce back, but if i resend the same email it ll get deliver without any error, 

    for reference please find the below error.

    Delivery has failed to these recipients or groups:

    abcd@test.com) Your message wasn't delivered due to a permission or security issue. It may have been rejected by a moderator, the address may only accept email from certain senders, or another restriction may be preventing delivery.

    The following organization rejected your message: relayemea2.hes.trendmicro.eu.

    Diagnostic information for administrators:

    Generating server: EXMB1.domain.local

    abcd@test.com) relayemea2.hes.trendmicro.eu Remote Server returned '554 5.7.1 <abcd@test.com)>: Recipient address rejected: Invalid-Sender-IP.'

    Original message headers:

    Received: from EXMB2.domain.local (192.168.0.19) by
     EXMB1.domain.local (192.168.0.20) with Microsoft SMTP Server
     (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id
     15.1.1034.26; Wed, 30 Jan 2019 08:47:25 +0300
    Received: from EXMB2.domain.local ([fe80::e1cb:ec30:dc1:7a43]) by
     EXMB2.domain.local ([fe80::e1cb:ec30:dc1:7a43%6]) with mapi id
     15.01.1034.026; Wed, 30 Jan 2019 08:47:26 +0300
    From: Charlotte <charlotte@mycompany.com>
    To: "Komp, " <abcd@test.com) >
    Thread-Index: AdS23tdb81U+Etx4Rruo+SJY+q2eXgAsSROgAANG6UAAMJHY0A==
    Date: Wed, 30 Jan 2019 05:47:26 +0000
    Message-ID: <a12c71c6f99a475faca37fb1d59f0b8f@mycompany.com>
    References: <b813eaa284ef480db953542ee3632fc4@DEEX2013MRS2.test.com>
     <928ec4c1f4d54d0698fda34e0d057b8c@mycompany.com>
     <019ee5422cac4bd6aac40d1664126710@DEEX2013MRS2.test.com>
    In-Reply-To: <019ee5422cac4bd6aac40d1664126710@DEEX2013MRS2.test.com>
    Accept-Language: en-GB, en-US
    Content-Language: en-US
    X-MS-Has-Attach: yes
    X-MS-TNEF-Correlator:
    x-originating-ip: [192.168.5.27]
    Content-Type: multipart/related;
            boundary="_005_a12c71c6f99a475faca37fb1d59f0b8fjaffarhruyancom_";
            type="multipart/alternative"
    MIME-Version: 1.0

    Yasar Altaf

    Thursday, January 31, 2019 9:49 AM

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    Hello , 

    Based on the error message it seems there is no issue with your exchange server .

    Looks like the device "elayemea2.hes.trendmicro.eu." is rejecting your message .

    Thanks & Regards S.Nithyanandham

    Thursday, January 31, 2019 10:04 AM
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    Hi Yesar Altaf,

    The error 554 5.7.1 generally is a rejection from recipient domain because the sender's address doesn't have sufficient permission or is invalid. Please verify if your IP address is in any blacklist.

    MX Toolbox blacklist check

    Please note: Since the website is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information. And the changes made in the above blog is not supported officially by Microsoft.

    Regards,

    Dawn Zhou

    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

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    • Edited by Dawn Zhou Friday, February 1, 2019 6:21 AM
    Friday, February 1, 2019 6:20 AM