My email senders getting lots of bounce back notices in spam

Question

My email senders getting lots of bounce back notices in spam

Anonymous

Hi

For the past two days, people who are sending emails to me are receiving a bounce back notice, even though I received the emails, almost instantaneously. The bounce back notices are going straight into their spam.

It’s causing confusion amongst the senders.

I also received many bounce back notices in my own spam.

Worth to mention that Microsoft sent me two notices about “suspected activities detected and asked me to change the password”.

They receive the following notice:

Delivery has failed to these recipients or groups:

idtienphuoc@emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc (idtienphuoc@emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc)Your message couldn't be delivered. The Domain Name System (DNS) reported that the recipient's domain does not exist.

Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that their domain isn't properly registered at their domain registrar. Give them the error details shown below. It's likely that the recipient's email admin is the only one who can fix this problem.

For more information and tips to fix this issue see this article: https://go.microsoft.com/fwlink/?LinkId=389361.

Diagnostic information for administrators:

Generating server: PUZPR04MB6560.apcprd04.prod.outlook.com

***@emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc
Remote server returned '550 5.4.310 DNS domain emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc does not exist [Message=InfoDomainNonexistent] [LastAttemptedServerName=emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc] [SG2APC01FT0049.eop-APC01.prod.protection.outlook.com 2024-08-19T22:50:02.151Z 08DCC05E95916ED3]'

Original message headers:

ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none;
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ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com;
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ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none;
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DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hotmail.com;
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Received: from SI6PR04MB8381.apcprd04.prod.outlook.com (2603:1096:4:23c::9) by
 PUZPR04MB6560.apcprd04.prod.outlook.com (2603:1096:301:f0::7) with Microsoft
 SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id
 15.20.7875.25; Mon, 19 Aug 2024 22:49:58 +0000
Received: from SI6PR04MB8381.apcprd04.prod.outlook.com ([::1]) by
 SI6PR04MB8381.apcprd04.prod.outlook.com ([fe80::eb3d:240f:951d:8a0f%3]) with
 Microsoft SMTP Server id 15.20.7875.019; Mon, 19 Aug 2024 22:49:58 +0000
From: (removed for privacy)
To: "idtienphuoc@emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc"
<idtienphuoc@emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc>
Subject: FW: Hi
Thread-Topic: Hi
Thread-Index: AQHa8ooZbk1hMr7yvkumaIU94OIljLIvLyiz
Date: Mon, 19 Aug 2024 22:49:58 +0000
Message-ID: <******@SI6PR04MB8381.apcprd04.prod.outlook.com>
References: <******@TYSPR04MB8265.apcprd04.prod.outlook.com>
In-Reply-To: <******@TYSPR04MB8265.apcprd04.prod.outlook.com>
Accept-Language: en-NZ, en-US
X-MS-Has-Attach:
X-MS-Exchange-Inbox-Rules-Loop: (removed for privacy)@hotmail.com
X-MS-TNEF-Correlator:
x-ms-exchange-parent-message-id: <******@TYSPR04MB8265.apcprd04.prod.outlook.com>
auto-submitted: auto-generated
x-ms-exchange-generated-message-source: Mailbox Rules Agent
x-ms-publictraffictype: Email
x-ms-traffictypediagnostic: SI6PR04MB8381:EE_|PUZPR04MB6560:EE_
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X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000
X-MS-Exchange-CrossTenant-Network-Message-Id: 1e014a16-c41f-4387-a3bc-08dcc0a140d4
X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 00000000-0000-0000-0000-000000000000
X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Aug 2024 22:49:58.9185
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa
X-MS-Exchange-Transport-CrossTenantHeadersStamped: PUZPR04MB6560

Delivery has failed to these recipients or groups:

idtienphuoc@emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc (idtienphuoc@emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc)Your message couldn't be delivered. The Domain Name System (DNS) reported that the recipient's domain does not exist.

Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that their domain isn't properly registered at their domain registrar. Give them the error details shown below. It's likely that the recipient's email admin is the only one who can fix this problem.

For more information and tips to fix this issue see this article: https://go.microsoft.com/fwlink/?LinkId=389361.

Diagnostic information for administrators:

Generating server: SEYPR04MB7528.apcprd04.prod.outlook.com

idtienphuoc@emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc
Remote server returned '550 5.4.310 DNS domain emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc does not exist [Message=InfoDomainNonexistent] [LastAttemptedServerName=emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc] [TYZAPC01FT033.eop-APC01.prod.protection.outlook.com 2024-08-19T11:45:45.537Z 08DCBF0424D8299F]'

Original message headers:

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Received: from SI6PR04MB8381.apcprd04.prod.outlook.com (2603:1096:4:23c::9) by
 SEYPR04MB7528.apcprd04.prod.outlook.com (2603:1096:101:1e2::12) with
 Microsoft SMTP Server (version=TLS1_2,
 cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7875.20; Mon, 19 Aug
 2024 11:45:43 +0000
Received: from SI6PR04MB8381.apcprd04.prod.outlook.com ([::1]) by
 SI6PR04MB8381.apcprd04.prod.outlook.com ([fe80::eb3d:240f:951d:8a0f%3]) with
 Microsoft SMTP Server id 15.20.7875.019; Mon, 19 Aug 2024 11:45:43 +0000
From: (for privacy)
To: "idtienphuoc@emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc"
<idtienphuoc@emailnaychidegioithieutoolkhongbudatacuaaedcdaunha.idtienphuoc>
Subject: FW: These classics are always in style
Thread-Topic: These classics are always in style
Thread-Index: AQHa8i1R/1kwRql1ak2cYKeJvcN5vLIudkl+
Date: Mon, 19 Aug 2024 11:45:43 +0000
Message-ID: <******@SI6PR04MB8381.apcprd04.prod.outlook.com>
References: <******@atl1s07mta1833.xt.local>
In-Reply-To: <******@atl1s07mta1833.xt.local>
X-MS-Has-Attach:
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auto-submitted: auto-generated
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Please help me with it.
Thank you

***For your privacy and security, we delete some PII information.***

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

6 answers

Answer 1

Dear besta119

Thanks for your post in Microsoft Community.

I understand that you are getting a lot of bounced emails on your account. I know that this situation is very disturbing and worrying.

First, you need to check your Sent Items and Deleted Items to see if there is a sending record of a large number of emails.

If these emails are not in your outbox, we have analyzed that your inbox can be used for "undelivered spam". This is when hackers use manipulation tools to impersonate your email address to send a lot of spam, because the address is invalid, all bounced emails (bounced emails) will be sent to your inbox.

In this case, you don't have to worry, the hackers haven't successfully hacked your account yet. If these emails appear in your outbox, it is recommended that you take immediate action to improve the security of your account.

Change your password: Immediately change your account password to a strong, unique password that you've never used before. Make sure it contains a combination of letters, numbers, and special characters.
How to help keep your Microsoft account safe and secure - Microsoft Support
Enable two-factor authentication: If you haven't already, enable two-factor authentication for your account. This adds an extra layer of security by requiring a second form of verification, such as a text message or authenticator app code, when logging in.
Set up an authenticator app as a two-step verification method - Microsoft Support
Support(At least three or more types of security information must be added).
Check account activity: Check your account activity log for unauthorized login attempts or unknown activity. Look for login attempts from IP addresses or locations that you don't recognize.
Check the recent sign-in activity for your Microsoft account - Microsoft Support

If there is any unusual activity that doesn't belong to you, you'll want to take action immediately to improve the security of your account.
How to sign out of your Microsoft account everywhere - Microsoft Support

Protect your devices: Make sure that all the devices you use to access your account are protected with up-to-date security software, including antivirus and anti-malware programs.

Also, to prevent this from happening again, you can change the primary alias of your account.

If you change your current email address to another one and set the new email address as your primary alias, hackers won't have a target to attack. However, it's important to be careful not to delete the old alias, as this will be equivalent to deleting it from Microsoft's servers and will delete all services, products, and emails that you previously subscribed to with that account.

You can refer to the following article to add another email address and set it as your primary alias.

Add or remove an email alias in Outlook.com - Microsoft Support

Things to consider below:

Check your account activity regularly: Check your account activity regularly to make sure there are no unusual logins.
Change your passwords regularly: Change your passwords regularly to improve the security of your account.
Education and prevention: Learn how to identify and prevent phishing and other cyberattacks.

Remember that it is essential to act quickly in these cases to minimize the risk of further unauthorized access. If you need further assistance or have any other concerns, please do not hesitate to contact the relevant authorities or a cybersecurity professional.

I understand that this situation is really frustrating and disturbing. If you have any other questions or need more help, I'm here to help. It is important to be vigilant and take proactive steps to protect your information.

Best regards

Clara G| Microsoft Community Support Specialist

Answer 2

Anonymous

Hi, I had already done all that, but my sender still receive the postmaster email with a weird adress from nowhere. How can I disociate this adress from mine ? Please help

Answer 3

Anonymous

I've got exactly the same issue. How do I get rid of this other email address?

Answer 4

I had this issue and I think I've managed to resolve it (touch wood).

I was logged into my outlook account via a web browser and this has to be on a laptop or PC and not an iphone etc.

Click on settings, (cog in top right corner) and then "Email" and "Rules" and I had an autoforwarding rule in there which I deleted and all has been ok since.

Good luck!

Answer 5

Anonymous

Thank you. It worked. 👍👍👍

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My email senders getting lots of bounce back notices in spam

6 answers