Share via

Delivery has failed to these recipients or groups: Remote Server returned '550 5.7.705 Service unavailable. Access denied, tenant has exceeded threshold

Anonymous
2021-10-18T01:55:20.86+00:00

Hi all,

My error message as follow:-

Diagnostic information for administrators:
Generating server: SI2PR03MB6221.apcprd03.prod.outlook.com
janiceho@hsbc .com.sg
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) [SI2PR03MB6221.apcprd03.prod.outlook.com]'
Original message headers:
Received: from SI2PR03MB6221.apcprd03.prod.outlook.com
([fe80::6124:d7a2:f9ea:2dd7]) by SI2PR03MB6221.apcprd03.prod.outlook.com
([fe80::6124:d7a2:f9ea:2dd7%4]) with mapi id 15.20.4628.013; Sun, 17 Oct 2021
05:02:39 +0000
MIME-Version: 1.0
Content-Type: text/plain
Date: Sun, 17 Oct 2021 05:02:39 +0000
Message-ID:
<******@SI2PR03MB6221.apcprd03.prod.outlook.com>
Subject: Accepted: Janice MF Ho's Zoom Meeting

Please kindly advise how am I going to resume back my outgoing emails? i simply couldn't send out any emails to anyone

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

1 answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Kai Yao 37,791 Reputation points Moderator
    2021-10-18T08:23:45.937+00:00

    Hi @Anonymous

    According to the information, the error message is "Remote Server returned '550 5.7.705 Service unavailable. Access denied, tenant has exceeded threshold. "
    Here is a link about this error for your reference: "Tenant has exceeded threshold" NDR when mail is sent from your organization

    The normal cause is a large amount of emails were sent from your tenant, which triggered a block by Exchange Online Protection.
    Please follow the Resolution part in this link and see if it can help with this issue.

    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

    Was this answer helpful?

    1 person found this answer helpful.

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.