I am unable to send an email.

Question

Delivery has failed to these recipients or groups:

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








Diagnostic information for administrators:

Generating server: YT1PR01MB8761.CANPRD01.PROD.OUTLOOK.COM

kellyrattanee@gmail.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) [YQBPR01MB10580.CANPRD01.PROD.OUTLOOK.COM 2023-04-24T11:42:54.020Z 08DB43EB7E734B08]'

Original message headers:

Received: from YT1PR01MB8761.CANPRD01.PROD.OUTLOOK.COM
 ([fe80::aefc:7b87:253d:8bc9]) by YT1PR01MB8761.CANPRD01.PROD.OUTLOOK.COM
 ([fe80::aefc:7b87:253d:8bc9%6]) with mapi id 15.20.6319.033; Mon, 24 Apr 2023
 11:42:54 +0000
MIME-Version: 1.0
Content-Type: text/plain
Date: Mon, 24 Apr 2023 11:42:54 +0000
Message-ID:
	<YT1PR01MB87616FA982064DF5FA684230D0679@YT1PR01MB8761.CANPRD01.PROD.OUTLOOK.COM>
Subject: t

Answer 1

Hi @Kelly Rattanee ,

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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