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Question

Diagnostic information for administrators:

Generating server: mx3.mydomain.de

******@mydomain.de
mx01.xxx.de
Remote Server returned '554 5.0.0 <mx01.schlund.de #5.0.0 smtp; 550 Requested action not taken: mailbox unavailable>'

Original message headers:

Return-Path: <******@mydomain.de>
Received: from mymail.mydomain.de (abc.ad.mydomain.net [10.0.87.122])
by mx3.intershop.de (Postfix) with ESMTPS id 187DE10065C
for <******@domain.de>; Tue, 13 Jun 2023 09:15:36 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=domain.de;
s=2023042001; t=1686640536;
bh=7Sm5L/n1EFt3j0Yegb01yWU7lJMUvJuLGK8ZlFDwT8w=;
h=From:To:Subject:Date:From;
b=pUE+7cZS+ZatURef/KXRT3hTxJFV5mmcmmEV1G70MOz7CHs7qWxtKEgPyNLxrgtwR
 V96Lr1Jr+Uuda1FivLjEwEhOrnjr8vV8l1EPa6mZTss/M7Rb/L2wzF3MLVflNsPIP1
 17u0Q1PEyT2h/CyPLLT/Y2O9fIMo6xgVW9kInLfOISO127MbDOnuZ59hYmIAEi4YTa
 uu2vWJUz+lT62mHiN7SlTbTWjpV8vGy1siWHqh81yIqb9tDrLo2muhhnA9HiyvrkRI
 bBYpHuCRg1KLfPgnaOSXrL7iyPOWtFGAwwHFNDgfEuNkFh82v0ay4NYsWCQ9xJaGLH
 mu6CCxSeGkoJJxVbevsR035KQKFz+Ks34mfQ8mlwIozaUbk2yOPRXv49qSM8i8/Xie
 Ijj8rQ3osWfyDyxBCoOW/8pJf76U6Fi//o+zmFZec7Vsg+NgsyQhCEZUnlOrEnrJ3P
 +4RWR6+xC5+M8kDTpVRgvOei1moWTA0KJzbG3Xnr+sE+NXCw/7sRiJdhC3m/iETtNG
 9ntSOf5zTQK3bQuQIQ6h4bX9LfycfgCDNPw6Gd/l+u5MVu4kJ2/REU6tvcpS9DVqDt
 kEK6r6q9dIyXpjz6q4LKddqhDNcf3pqzoYhpCeuZGFSBEbhAuGvdgbDfxLqe7W4ROc
 flgoZFPwZ9uodr/oQoE1IErc=
Received: from 123.ad.intershop.net (10.0.87.122) by
 JENEX19-2.ad.intershop.net (10.0.87.122) with Microsoft SMTP Server
 (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id
 15.2.1258.12; Tue, 13 Jun 2023 09:15:35 +0200
Received: from JENEX19-2.ad.intershop.net ([fe80::5b2b:20f7:8850:b768]) by
 JENEX19-2.ad.intershop.net ([fe80::5b2b:20f7:8850:b768%17]) with mapi id
 15.02.1258.012; Tue, 13 Jun 2023 09:15:35 +0200
From: Johannes Klein <******@domain.de>
To: =?iso-8859-1?Q?Philipp-Wilhelm_Str=F6h?=
<******@domain.de>
Subject: Aufgepasst! Dein Umsatz ist in Gefahr!
Thread-Topic: Aufgepasst! Dein Umsatz ist in Gefahr!
Thread-Index: AQHZncbZkBax2dJR9UamXdpCxbuoyw==
Date: Tue, 13 Jun 2023 07:15:35 +0000
Message-ID: <******@mailer.nylas.com>
Accept-Language: de-DE, en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [195.110.60.24]
Content-Type: multipart/alternative;
boundary="_000_8ai0pvuf4aqljw4w580yuiize0mailernylascom_"
MIME-Version: 1.0
X-Virus-Scanned: clamav-milter 0.103.8 at mx3.intershop.de
X-Virus-Status: Clean

I have tried to send it again, but without success. A lot of Mails can not be sent, now my question is why and how can i stop it?

Answer 1

Hello Johannes Klein,

Thank you for your response.

May I please know if you have reached out to your admin to check the MX records for your domain?

Also, incase you managed to run the Outbound mail flow test, please share with me the result/report. You can share this via a private message I have initiated data or account privacy. You can access the private message section via "My profile." Account manager-->my profile-->View private message. (See below screenshot)

Looking forward to your response.

Best Regards,

Ashraf

Answer 2

1. M365 Exchange
2. I dont know
3. Specific ones

Answer 3

Dear Johannes Klein,

Thank you for posting to Microsoft Community.

I understand that you are having issues sending emails from your account. My apologies for the inconvenience that this is causing you. Please let me know of the following in order to better assist. Thanks in advance.

1. What is the type of account that you are using? Is it M365 Exchange, IMAP or POP?
2. May I know whether the employee have changed MX DNS records for your custom domain?
3. Is this happening to emails to all recipients or specific ones?

In the meantime, please check with your email or 0365 admin to make sure that there hasn't been any change to the MX records to your domain. Also, confirm if the MX record for the domain includes a value similar to: MXtoken.mail.protection.outlook.com. Please refer to Add an MX record for email (Outlook, Exchange Online)

You may as well check whether the outbound mail flow is working correctly using the Microsoft Remote Connectivity Analyzer: Outbound SMTP Email Test Input.

Kindly note that this above requested information is required for further analysis and troubleshooting of your situation. Your patience and cooperation are much appreciated.

Looking forward for your response.

Best regards,

Ashraf.