Some emails bouncing back all of a sudden !

Question

15-01-24

Hello, all of a sudden for the last few days, emails I am sending to 2 people I often send emails to are not going through & are bouncing back, typically with the message seen below. ( this is not the whole message, but the top & main body of text

At first it was to person with an AOL account, I thought it was just that email address, but now this is happening to another Yahoo address, I can receive emails from them & if I send them an email from another gmail account I have, they go through.

I send main emails & it is only to these 2 addresses that I seem to get a bounce back from ?

Can anybody help here ? I have put the error code on Google to see If I can sort, but it is baffling to me !

Many thanks

Delivery has failed to these recipients or groups:

*Email removed for security* @aol.co.uk (*Email removed for security*@aol.co.uk)
Your message couldn't be delivered. Despite repeated attempts to contact the recipient's email system it didn't respond.

Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that their email system isn't accepting connection requests from your email system. 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: CWLP265MB6229.GBRP265.PROD.OUTLOOK.COM
Receiving server: CWLP265MB6229.GBRP265.PROD.OUTLOOK.COM
Total retry attempts: 4

*Email removed for security*@aol.co.uk
1/14/2024 7:02:52 PM - Server at CWLP265MB6229.GBRP265.PROD.OUTLOOK.COM returned '550 5.4.300 Message expired -> 421 4.4.2 Connection dropped due to SocketError'
1/14/2024 6:38:13 PM - Server at mx-aol.mail.gm0.yahoodns.net (67.195.228.84) returned '421 4.4.2 Connection dropped due to SocketError'

Original message headers:

Received: from LO0P265MB5023.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:229::12)

 by CWLP265MB6229.GBRP265.PROD.OUTLOOK.COM (2603:10a6:400:184::6) with

 Microsoft SMTP Server (version=TLS1_2,

 cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7181.23; Sun, 14 Jan

 2024 17:04:27 +0000

Received: from LO3P265MB1993.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:10f::14)

 by LO0P265MB5023.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:229::12) with

 Microsoft SMTP Server (version=TLS1_2,

 cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7181.23; Sun, 14 Jan

 2024 05:59:29 +0000

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 by LO3P265MB1993.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:10f::14) with

 Microsoft SMTP Server (version=TLS1_2,

 cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7181.23; Sat, 13 Jan

 2024 19:02:51 +0000

Received: from LO2P265MB3150.GBRP265.PROD.OUTLOOK.COM

 ([fe80::4398:d592:a326:4b99]) by LO2P265MB3150.GBRP265.PROD.OUTLOOK.COM

 ([fe80::4398:d592:a326:4b99%3]) with mapi id 15.20.7181.022; Sat, 13 Jan 2024

 19:02:51 +0000

From: Mat Blake <*Email removed for security*@blakebuilders.co.uk>

To: "******@aol.co.uk" <*Email removed for security*@aol.co.uk>

Subject: FW: Test

Thread-Topic: Test

Thread-Index: AdpGPJk0jHdGDe0ET4y45CUNPqQ0JAAFktAg

Date: Sat, 13 Jan 2024 19:02:51 +0000

Message-ID: <******@LO2P265MB3150.GBRP265.PROD.OUTLOOK.COM>

References: <******@LO2P265MB3150.GBRP265.PROD.OUTLOOK.COM>

In-Reply-To: <******@LO2P265MB3150.GBRP265.PROD.OUTLOOK.COM>

Accept-Language: en-GB, en-US

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X-MS-Has-Attach:

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x-ms-publictraffictype: Email

x-ms-traffictypediagnostic:

 LO2P265MB3150:EE_|LO3P265MB1993:EE_|LO0P265MB5023:EE_|CWLP265MB6229:EE_

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Answer 1

Hi Matthew

Thanks for writing us here in Microsoft Community.

Based on the non-delivery report log, it appears like your email seemed to be tagged as spam from the recipients end. It is possible that the issue is on the recipient's end, and they may need to contact their email service provider for assistance. However, you can also try resending the email or contacting your email service provider for further assistance.

I'd like to ask few questions from you to better understand your issue.

1. What's the email domain of the account you are using to send? Is it @hotmail/outlook.com, or custom domain email?
2. Can you confirm if you're only getting this non-delivery message or logs when you're sending emails from a business account?
3. What type of emails are you trying to send? Is it advertisements, newsletters, or just regular emails?
4. What license are you using with your Office?

Here are some steps you can try.

1. Check if there are any mistakes in the recipient’s email address. If the email address is incorrect, your emails will bounce back. You can try sending an email to a different email address of the same person to see if it goes through.
2. Check if your emails are being blocked by the recipient’s email provider. Sometimes, emails sent from Hotmail accounts can be blocked by the recipient’s email provider. You can ask the recipient to check their spam or junk folder, add your email address to their safe senders list, or contact their email provider to ask if they are blocking emails from your email address.
3. Check if your emails are being marked as spam. Sometimes, emails sent from accounts can be marked as spam by the recipient’s email provider. You can ask the recipient to check their spam or junk folder and add your email address to their safe senders list.

Hope this helps! Let me know if you have any concerns or clarifications.

Sincerely

Froilance T.

Microsoft Moderator

Answer 2

Hi Matthew

We haven't heard from you, so we assume that your issue has already been addressed. We will not be monitoring this thread moving forward so, if you need further assistance, please create a new thread to discuss these concerns by clicking this link: Create a new question (microsoft.com)Thank you for understanding.Regards,Froilance T.Microsoft Moderator

Answer 3

Hi I managed to speak to another company who quickly resolved the issue, not sure how but it is fixed !

Thanks anyway

Mat Blake

Answer 4

hi there,

we are facing the same issue and we tried so many times but its not getting fixed so if you don't mind what company did you use to solve your issue??

many thanks

Answer 5

Hi

I thought my email address was still being controlled by a Proxy company I used originally for it, however they inform,ed me that Outlook Microsoft Exchange was now where all emails are controlled through as such, not sure who you use ?

The person I was speaking to thought he knew what the issue was, he put me on hold & went to Microsoft to get some settings/code, then applied them to my email address as they could still see it on their system as that is where it was originally formed & it solved the issue.

technically I am not sure how he did it, but I would suggest you approach whoever your emails go through & they should be able to sort the issue, not the other parties you are sending emails to as such, which is what I thought the issue was ?!

Hope this helps Good luck