I want to know the cause of this problem. I can't send an email ?!

Nadim Ateih 0 Reputation points
2023-04-15T08:58:15.2133333+00:00

when sending an email Show me this text message Please this causes a lot of problems at work the message:

Delivery has failed to these recipients or groups:

******@hotmail.com
Your message wasn't delivered because the recipient's email provider rejected it.


Diagnostic information for administrators:

Generating server: PRAPR09MB5506.eurprd09.prod.outlook.com

******@hotmail.com
Remote server returned '550 5.7.705 Service unavailable. Access denied, tenant has exceeded threshold. For more information please go to http://go.microsoft.com/fwlink/?LinkId=526653 S(7136) [PAVPR09MB6184.eurprd09.prod.outlook.com 2023-04-15T08:44:47.143Z 08DB37B336985459]'

Original message headers:

Received: from PRAPR09MB5506.eurprd09.prod.outlook.com
 ([fe80::4173:628e:27c8:eabd]) by PRAPR09MB5506.eurprd09.prod.outlook.com
 ([fe80::4173:628e:27c8:eabd%6]) with mapi id 15.20.6277.046; Sat, 15 Apr 2023
 08:44:47 +0000
MIME-Version: 1.0
Content-Type: text/plain
Date: Sat, 15 Apr 2023 08:44:47 +0000
Message-ID:
	<******@PRAPR09MB5506.eurprd09.prod.outlook.com>
Subject: test
Outlook | Windows | Classic Outlook for Windows | For business
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  1. Faery Fu-MSFT 19,756 Reputation points Moderator
    2023-04-17T02:57:56.58+00:00

    Hi @Kacpersdz ,

    According to the information, the error message is "Remote Server returned '550 5.7.705 Service unavailable. Access denied, tenant has exceeded threshold. " When there are too much spam or bulk mail has been sent from your organization so Microsoft blocks users in your organization from sending outgoing emails.

    Here is a link about this error for your reference: "Tenant has exceeded threshold" NDR when mail is sent from your organization


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