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Hello Everyone,

Hope you all are doing well.

Today issue and solution – lesson learned

Background

• I use Microsoft 365 Outlook, to send the mails and other communication.
• While sending new I am getting Delivery failed mail from 2 to 3 days.
• I tried in the possible ways to resolve it by removing and adding the Outlook License in Active Azure Directory to my account.
• Also checked any permissions needed for mails from the recipient side, but my mails are not getting delivered.
• But I found a solution and it works for me to rectify the issue, and sharing the solution here.

Issue / Error

Delivery has failed to these recipients or groups:

Receiver mail address xxxxxxxxxxx

Your message wasn’t delivered because the recipient’s email provider rejected it.

Diagnostic information for administrators:

Generating server: BM1PR01MB2498.INDPRD01.PROD.OUTLOOK.COM

Receiver mail address xxxxxxxxxxx

Remote Server returned ‘550 5.7.501 Service unavailable.

Spam abuse detected from IP range.

For more information please go to http://go.microsoft.com/fwlink/?LinkId=526653.

S(2017052602) [MAXPR01MB3918.INDPRD01.PROD.OUTLOOK.COM]’

Original message headers:

Received: from BM1PR01MB2498.INDPRD01.PROD.OUTLOOK.COM

 ([fe80::81ca:e6f8:252a:5fd5]) by BM1PR01MB2498.INDPRD01.PROD.OUTLOOK.COM

 ([fe80::81ca:e6f8:252a:5fd5%7]) with mapi id 15.20.5332.012; Wed, 8 Jun 2022

 12:13:56 +0000

MIME-Version: 1.0

Content-Type: text/plain

Date: Wed, 8 Jun 2022 12:13:56 +0000

Message-ID:

        <BM1PR01MB2498701FECE256F4EDEDC7BD80A49@BM1PR01MB2498.INDPRD01.PROD.OUTLOOK.COM>

Subject: Teams Channel Demo Meeting

Details

• In our company we use Microsoft 365 Outlook for email communication.
• If someone send me an emails, my Outlook receiving the emails.
• But when I am replaying / forward / sending new emails to somebody, the mail were getting underlived.

Cause

In Microsoft 365 Outlook, for Sending All New Emails need to set the Default Email Account and check it always use the Default Email Account.

Solution

• Login to Microsoft 365 Outlook with desktop app.

• In Outlook, click on File.

• Now choose the Outlook Options.

• In Options, click on Mail.

• In Mail, scroll down for Send messages.
• Under Send messages, check the box Always use the default account when composing new messages..

• Click on OK.

Hope this article will help you to resolve the Outlook Delivery Failed issue.

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Thank you for your support, will catch up with new article soon.

Keep learning and keep smiling 🙂

Thanks.